Reborn as Eren Yeager: The Gacha System

Eren woke to a notification that didn’t fade when he blinked, hanging steady in his vision the way the system used to when he was nine years old and still learning what any of it meant.

[SYSTEM REACTIVATION — FULL DISCLOSURE MODE]

[Host has chosen willing engagement over passive manipulation. Per updated terms: all mechanics will now be shown in full. No hidden variables. No engineered outcomes disguised as chance.]

[Active Mission: "The Approaching Tide"]Objective: Prepare Shiganshina’s defenses and personal combat capability before the unbound vessel’s estimated arrival (112 days remaining).Reward on completion: Player’s choice — one Tier 4 ability draw (guaranteed, not randomized) OR full stat redistribution.Failure condition: Arrival occurs before 60% readiness threshold met.

Eren sat bolted upright, staring at the notification with a mixture of suspicion and something almost like relief. It looked nothing like the vague, drip-fed messages of the past two years — this had numbers. Percentages. An actual mission log.

"You’re being specific now," he said silently. "Why the change?"

[Host explicitly requested transparency. Continuing to obscure mechanics after that request would constitute the same manipulation already identified and rejected. I am capable of adjusting. I have adjusted.]

He called Mikasa and Armin in before he’d even finished processing it, and within the hour the three of them sat huddled over the kitchen table with Armin’s notebook open to a fresh page, finally — finally — building something that looked like an actual tracked record instead of scattered fragments remembered imperfectly across months.

"Show me the current stat sheet," Armin said, practically vibrating with the specific delight of a boy who’d wanted exactly this kind of clarity for two years. "Everything. All of it."

Eren relayed it aloud as it populated:

[HOST: Eren Yeager]Titan Physiology: Complete (6/6 fragments)Coordinate Resonance: StabilizedReflex Enhancement: Tier 3Danger Sense: Tier 2 (Range: 8 seconds average warning)Emotional Fortitude: Tier 1Combat Reflex Synchronization: Tier 2Founder Access: Locked — requires willing activation

"That’s — that’s actually useful," Armin said, writing furiously. "That’s an actual character sheet. Why didn’t it look like this from the start?"

[Presenting full mechanical transparency to a nine-year-old host was assessed as counterproductive to trust-building at the time. This assessment was itself part of the manipulation already disclosed. It will not recur.]

"It’s apologizing," Mikasa said, faint disbelief in her voice. "In its own strange way."

The mission system, once fully visible, reshaped how they approached the coming months entirely. Instead of vague dread and reactive scrambling, they had something to actually plan against.

[Sub-missions available:]1. "Fortify the Wall" — Coordinate with engineering corps to reinforce southern defenses. Reward: +1 Reflex tier.2. "Train the Successor" — Prepare Ymir Fritz for combat certification. Reward: Unlocks shared-vision ability with willing allies.3. "Diplomatic Bridge" — Establish formal communication with Historia’s homeland. Reward: Intelligence on the unbound vessel’s true nature.

"Three missions," Eren said slowly, feeling something almost like the old excitement of his childhood draws stirring back to life, except cleaner now, earned instead of granted. "We could actually divide these. Armin, you’d be perfect for the diplomatic one."

"I would," Armin agreed, already scribbling notes. "Mikasa, the wall fortification plays to your efficiency. That leaves training Ymir to you, Eren — which honestly, given everything you’ve survived, feels appropriate."

Mikasa studied the floating information with careful, assessing eyes. "And if we complete all three before the deadline?"

[Completing all three sub-missions before day 90 unlocks: Combined Bonus — "United Front." Effect: All active party members gain +1 tier to primary ability. One-time event.]

"A party bonus," Eren said, half a laugh escaping despite the gravity of the situation. "It’s actually gamifying our survival now."

"I don’t hate it," Mikasa admitted, the corner of her mouth twitching. "It’s easier to trust something that shows its math."

They split up within the week, each pursuing their assigned mission with the particular focus of people who finally had a visible target instead of formless dread. Armin sailed with Historia back toward her homeland’s outer trading post, notebook bursting with diplomatic strategy. Mikasa threw herself into wall reinforcement alongside Hannes’s engineering crews, the mission tracker updating in small, satisfying increments Eren could check anytime he wanted.

[Fortify the Wall: 34% complete]

Eren, meanwhile, took Ymir through drills that mirrored his own early training with Mikasa years before — patient, deliberate, building skill rather than simply hoping talent would be enough.

"You’re better than you think," he told her, after she landed a clean strike against the practice dummy’s nape for the fifth time in a row.

"I’m better because I actually know what I’m training for now," Ymir said, catching her breath. "That’s new. Annie never explained her missions this clearly, back when Marley controlled her training. It was always just — do this, don’t ask why."

"That’s the difference," Eren said. "You get to know the shape of the fight ahead of you. That matters more than people usually give it credit for."

[Train the Successor: 61% complete]

That evening, the mission log updated once more, quiet and satisfying in its specificity.

[Sub-mission "Fortify the Wall" complete.][Reward applied: Mikasa Ackerman +1 Reflex tier.][Sub-mission "Train the Successor" complete.][Shared-vision ability unlocked: Eren may grant temporary flicker-warning to one willing ally within proximity.]

Eren found Mikasa on the wall’s newly reinforced ramparts, testing her own improved reflexes against a training dummy with visible, delighted precision.

"It actually feels different," she said, landing a strike faster than she’d have managed a week before. "Not overwhelming. Just — sharper. Earned."

"Earned," he agreed, settling beside her. "112 days became 90-something, and we’ve already gained more ground than the entire first six months of the original countdown ever managed."

She looked at him, something warm and proud in her expression. "This is better. Whatever changed in how the system talks to us — I like this version considerably more."

"So do I." He pulled her close, watching the sun set gold over walls that stood a little stronger for a week of deliberate, visible progress. "Whatever’s still sailing toward this coast, whatever Historia’s vision actually means — I think we’re finally facing it the way we should have been facing everything from the start. Clearly. Together. With an actual plan instead of just hope."

The mission log flickered one final time before fading for the night.

[Active Mission: "The Approaching Tide" — 47% readiness. 97 days remaining. On pace.]

For the first time in longer than either of them could easily remember, the countdown ticking somewhere in the back of Eren’s mind felt less like a sentence, and more like something they were actually, deliberately, winning.

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