Chương 143: 53. Prerequisite 4

The United Interstellar Military Academy's central library was enormous. Not the hollow kind of enormous that exists to impress prospective students, but the genuinely disorienting kind where first-time visitors instinctively wonder if the building has quietly absorbed three neighboring city blocks. The main entrance opened into an atrium with a ceiling high enough to turn a small transport around in.

The transparent dome cut the midday light into neat squares that fell across the floor and railings, bright like the gentler cousin of a surveillance system. Bookshelves curved along the walls and climbed upward, connected by metal walkways on the second and third floors—a stacked architecture of knowledge-shaped traps. Students everywhere.

Enough that from the entrance alone you could see: someone bolting down the stairs clutching documents like credits were chasing them; someone slumped at a window table wearing the expression of a person who'd sold their life to a midterm paper; clusters walking and talking, voices pressed low but not low enough; and in the corners, individuals bent over pages, keyboards, and spreadsheets, every one looking like they were writing advance obituaries for disasters that hadn't happened yet.

By the time I'd climbed to the east section on the second floor with my textbooks, I was convinced this place operated on the same principle as the academy itself: both pressure vessels wrapped in civilization. One wrung you out with instructors and drill fields; the other slow-cooked you with books and silence. The east reading section was quieter than the atrium. Long tables in neat rows, flanked by bookshelves tall enough to swallow half a person's silhouette. Deeper in were semi-enclosed study carrels.

The light was softer, footsteps absorbed by carpet, the sound of turning pages unusually distinct. I found a seat near the shelves with a view of the aisle, set my stack of new materials on the table, and felt my stomach start hurting just from looking at the covers. I opened Foundations of Fleet Management. Page one: Federation standard fleet formation diagram. Page two: chain of command.

Page three onwards: the kind of sentences where the author could have saved countless students with one additional line of human language, and chose not to. Five minutes in, I found myself missing the firestorm. At least the firestorm was honest about wanting to kill you.

"Start with the fleet management introduction. Don't go straight to the operational framework." A familiar voice dropped in from beside me. I looked up. Kushima stood at the table, holding two paper bags and a bottle of water. Her bangs had come slightly loose from walking quickly, but her breathing was steady, her expression steady, and when she set things in front of me, her movements were noticeably gentler than usual.

"What's this?"

"Lunch."

"I didn't say I wanted—""Chicken sandwiches. Two. Sufficient calories, not slow to eat. And soup." She took items out one by one, voice as calm as a ship's supply inventory.

"If you want to read and eat at the same time, start with the easy material. I don't recommend this book on an empty stomach." I looked at the lunch on the table, then at the portion she was still holding for herself.

"You bought mine?"

"Yes."

"Why?" Kushima set a napkin beside my hand and finally looked up at me.

"Because you forget to take care of yourself," she said.

"And I don't want to sit through a second read-through with someone who's crashed from low blood sugar." This woman had a genuine gift for packaging borderline-overstepping statements as completely reasonable cost-benefit analysis. And I couldn't find a single thing to argue with. I opened the bag and took a bite of the sandwich. The chicken was warm, the bread edges slightly firm, but infinitely better than the cafeteria options that looked like they'd lost their souls somewhere in an industrial assembly line.

Kushima waited until I was actually eating before sitting down across from me and spreading her own books and notes. Neither of us spoke. She reorganized my stack, moving Foundations of Fleet Management to the top and burying the life-draining Excerpts from the Federation Destroyer Standard Operating Framework at the bottom.

"Understand how a fleet moves first. Then look at how a single destroyer stays alive." She made a quick arrow in the margin with her pencil.

"Otherwise you'll drown in terminology before you get anywhere." I chewed my sandwich and stared at her handwriting. Neat. Steady. Infuriatingly reliable. The library's ambient noise floated at a distance, like water held back by glass and shelves. Midday light angled through the dome and caught the edge of the table—when it reached her fingers, the line of her knuckles was almost too clear. I took a sip of soup; the steam hit my face and burned away whatever inconvenient thought had been forming.

"Shimo."

"What."

"Swallow before you talk."

"..."

"Also—when you don't understand something, don't force it. You're very obvious when you're frowning." I looked up and glared at her. She slid her notebook slightly toward me, expression unchanged.

"From here, I'll go through it with you." Something strange passed through me in that moment. Not the cheap shoujo-manga heart skips a beat reaction. Not she's so gentle either—I'd make myself sick saying that. More like— After surviving the firestorm, I'd assumed everything that followed would be harder, colder, more like iron.

But here in a library full of voices and turning pages, surrounded by materials that could technically be used as blunt weapons, someone had brought me lunch, reorganized my books, and seemed to have already calculated exactly when my pride would make me force something I shouldn't. That was dangerous. Not because she'd get me killed. Because I was starting to get used to her sitting beside me. I finished the rest of the sandwich in one bite and made my voice deliberately sharp.

Stolen content warning: this tale belongs on Royal Road. Report any occurrences elsewhere.

"For the record, I'm not accepting this study-buddy arrangement because you bought lunch." Kushima opened her notebook without looking up.

"I know."

"Then what do you think it is?"

"You're afraid of embarrassing yourself on the Yukikaze." I nearly choked on my soup. She finally looked up, and at the corner of her mouth was the faintest, almost imperceptible curve.

"But that's fine," she said.

"Before you embarrass yourself, I'll pull you back."... Damn. That line was genuinely out of bounds. After she said it, Kushima acted like she'd simply confirmed the weather, lowered her head, and turned to the first page of her notes. I stared at her for two seconds, then swallowed the soup that had nearly killed me.

"Let me be clear." I set the cup down and did my best to sound like someone who still had dignity.

"I don't completely not understand this. I just—""You just hate textbooks that take one plain sentence and stretch it across three pages of bureaucratic noise," she said, finishing for me.

"... Yes."

"I know." She turned back to the front pages of Foundations of Fleet Management, picked up her pencil, and drew three quick lines in the margin.

"Don't think of it as a warship yet," she said.

"Think of it as a unit that's been forced to keep moving and can never stop to breathe." I frowned.

"Like Squad 144?"

"Scaled up considerably. And if anyone starves, takes a wrong turn, sleeps through their shift, grabs the wrong equipment—it can end with the entire ship going down together." She wrote personnel beside the first line, supplies beside the second, orders beside the third.

"Fleet management is fundamentally just keeping these three things from failing simultaneously." I looked at her writing. That framing was annoyingly effective. The moment she translated fleet, rotation, logistics, and deployment into who goes where, who has what, and who actually answers to whom, the tangled mass in my head started to loosen.

"Look at this section." She tapped the page with her pencil tip.

"This says frontline vessel operational efficiency is contingent upon the integrity of supply nodes and command relay infrastructure. It reads like a suicide note. In plain language: if the resupply point gets cut off and the messenger is dead, you can have a knife, two working legs, and the will to survive, and you're still a corpse."

"You really have a gift for making enemies at textbook publishers."

"Thank you."

"That wasn't a compliment."

"I know." For fuck's sake. She was getting faster at catching my rhythm. I looked back at the page. This time it moved considerably more smoothly. The terminology that had looked designed to terrify first-years suddenly had shape, had flow, even had a familiar smell—not the smell of books, but the smell of get the allocation wrong once and everyone goes down with you. When you stripped it back, ground survival and fleet management weren't entirely different things.

We'd been counting water and hemostatic patches in the mud; now it was fuel, rations, duty rosters, and the question of when a person's mind would finally snap.

"Don't touch this one yet." She pushed the Excerpts from the Federation Destroyer Standard Operating Framework further away.

"If you open that now, you'll end up hating the Federation, then the shipyards, and finally every human being who has ever written a textbook." I turned a page and laughed dryly.

"Sounds like personal experience."

"It is." She said it without expression.

"The first time I read it, I almost used it to level a table." I looked at her. Her face was completely steady—steady enough that I couldn't tell if she was joking or had genuinely nearly committed violence against educational materials. Given that Maki Kushima normally had the emotional range of a medical equipment manual, I should have assumed the former. For some reason, my gut said the latter.... Okay. Somehow slightly endearing. No. Retract that. That description is too dangerous.

"What about the Yukikaze?" I killed that thought before it could finish forming and forced the subject back on track.

"If I'm actually going on board, I at least need to know where a destroyer is most likely to die."

"Many places," she answered with complete honesty, like helping me select a coffin style.

"But for a first-year, it's more important to understand why a ship that's still floating can already be dead." She flipped to a chapter on shipboard duty rotation and quickly marked several passages.

"A ship isn't just the captain giving orders and everyone performing flawlessly. What actually breaks a ship first is usually something stupider. Information passed incorrectly. Rotations falling apart. Supplies miscalculated. Medical priority sequencing wrong. Someone past their limit still forcing it. Someone who thinks they understand something, touching a system they shouldn't." I instinctively pushed back: "Is that last one aimed at me?"

"Not aimed," Kushima said, glancing at me.

"Preventive."

"..." She tapped my page with her pencil, like reminding a stubborn child to take their medicine.

"Shimo. Your strengths are fast reaction, strong situational instinct, and knowing what someone looks like when they're about to break. Your weakness is that you very easily believe if I just step up right now, things will hold." I opened my mouth to argue, then closed it again. Because she was too accurate. Accurate enough that I wasn't sure whether she was analyzing me or disassembling every ugly moment from the forest assessment and showing me exactly how I'd shouldered my way through each one.

"You can't run an entire ship on your shoulders," she said quietly.

"Once the people count goes up, once the system gets large enough, instinct alone won't save everyone. You have to learn to make sure other people know when to move and when not to act on their own." The library was quiet. Not completely silent—every breath, turned page, and shifted chair was just pressed very far away, very soft. Far enough that I could almost hear the exact way her last word settled in the air. I stared at the book for a moment, then made a short, reluctant sound.

"... The way you say it makes it sound like I've always been improvising."

"You often have been," Kushima said.

"Hey."

"But your improvisation success rate is higher than most people's." She added the follow-up with the same composure.

"Which is the problem. People who succeed too many times start mistaking risk for a friend." I turned my pen half a rotation and finally conceded, somewhat unwillingly.

"Fine. That one's fair."

"I know."

"Are you saying that a lot lately?"

"Because you've been admitting I'm right more often lately." This person. I was about to glare at her, but when I looked up, I caught her pushing the other half of my unfinished sandwich a little closer to my hand. Small motion. Didn't look at me. That kind of too-natural small gesture was the most infuriating kind. Like she'd already factored in she'll forget to eat the moment she starts reading and quietly filed it under things to manage.

What was worse was that I was slowly starting to feel like that wasn't entirely wrong. That was genuinely dangerous. The danger being: if someone consistently fills in the gaps before you've said anything, you eventually start relying on the feeling of being filled in. I took a bite of the sandwich and used the chewing to smother whatever that thought had been. Kushima continued like nothing had happened.

"Break fleet operations into three questions." She wrote on my blank page: Who is moving What they're moving with Who decides where"People, supplies, orders," I said, looking at the three lines.

"Yes." She nodded.

"Almost everything complicated afterward is just a variation on these three. If you hold onto this, when you look at Yukikaze-related materials later, you won't feel like you're reading alien mating documentation." I almost sprayed soup across the table.

"That's a terrible analogy."

"But you understood it."

"... I really hate how efficient you are."

"I know." I rolled my eyes, then copied her three lines into my own notes anyway. Handwriting a little uneven. Brain not fully caught up. But at least I was no longer at the open the textbook and immediately want to pass out stage. I turned a few more pages, and this time managed to find some thread of logic on my own. Which parts were about command chains, which about supply nodes, which were just the author's caffeinated obsession with administrative formatting.

When I got stuck, Kushima would put me back on track in the fewest possible words. Not re-explaining entire sections, not the kind of over-assistance that makes you feel like an idiot. She just always knew exactly when I was about to start fighting the material with brute force, and landed a correction in the right place just before I did.... Very like her.

"Shimo."

"Yeah?"

"Your frown is pointing the wrong direction."

"What?"

"You're not confused by this section." She tapped the lower half of the page.

"You understand it. You've started hating it." Two seconds of silence. Then I admitted it, without much dignity.

"... Yes." Because this section was about: When resupply can only sustain part of the fleet, how to prioritize preserving core combat capability. In plain language: if there isn't enough, who lives first, who dies later. I'd seen that kind of choice in the rainforest. We'd been choosing between water, medicine, and who could still run with the group. Different setting, different packaging, same brutal logic underneath. Kushima looked at me, voice dropping.

"Just remember it for now. You don't have to make peace with it yet."... That line worked better than any comfort I could think of. I closed the book for a moment, then opened it again.

"Fine." I took a breath.

"Let's keep going. I've already been dragged into this by the Kushima family, it's too late to run." The corner of Kushima's mouth moved, just barely.

"Not the Kushima family," she said.

"This time, it's me helping you."

"Oh?"

"Yes."

"So if I actually end up on the Yukikaze and embarrass myself on the bridge because I couldn't get through all this material—""I won't let you embarrass yourself." She said it quickly. Almost no pause. I stopped. She seemed to catch herself too. Her fingertip rested on her pen for half a second before she added a version that sounded more like her usual register.

"... At least not too badly." I looked at her, and suddenly wanted to laugh. Not mockingly. More like the kind of laughter that surfaces when you're about to be flattened by something, and you suddenly notice someone beside you has already taken half the weight without being asked. The inexplicable, badly timed kind.