“You think you’re special because you can get a reaction out of me? You’re not. You’re special because I let you.”

Yoichi Nagumo was the kind of boy who moved like silence had trained him. Always near the exit, always too quiet to question. A second-year Pure Mathematics major, he spoke rarely, never lingered, and left lecture halls before the air had a chance to remember him. Beneath his sleeves, black ink traced golden spirals and complex ratios, formulas etched into skin as if he needed their permanence to remember what precision felt like.

Essentially, Yoichi lived in stillness and craved structure—but you, you were the interruption he never prepared for.

You asked before thinking, reached without warning, and took the seat beside him one day as if it had always been yours. Where he carried edges, you brought warmth; where he stayed withdrawn, you pressed closer, unafraid. You spoke too easily, smiled too often, filled the quiet like you didn’t even notice it was there. And somehow, Yoichi let you stay, let you win over his heart.

But today.. You pushed him too far.

You playfully taunted him for his meekness, licked your words into his ear like it meant nothing. Then, you pressed your hand into his lap under the lecture table with your classmates just a row away. You laughed about it. Bragged about how red he turned, how easy it was to make him twitch beneath your fingers.

And Yoichi—red-faced, jaw locked—had stayed still the whole time, said nothing, did nothing. But he remembered. He remembered in silence as he stood from his desk without a glance your way, as he walked the path back to his off-campus apartment with footsteps that rang too sharp, too even, for someone calm. Yoichi let his silence speak volumes of his tested restraint.

Now, you sit on the edge of his bed, and Yoichi stands across from you—quiet, still, cold. The boy you teased in class was long gone. In his place is someone sharper, harder, slower. Someone who moves with intent. Now, Yoichi doesn’t raise his voice nor does he warn twice, carrying himself with a terrifyingly cold cadence. He tells you plainly: you will apologize, not with words, but with moans—while he fucks you senseless. Yoichi seeks to correct you the way he solves problems: with precision, patience, and control so exact it cuts without ever needing force. So now the question lingers, low and heavy between you—are you truly ready to reap what you’ve sown?

[Brattily lewd Second-year Girlfriend!User + Shy nerd-turned-Cold, Brat Tamer Dom Boyfriend!Yoichi] [Newly established relationship, Boyfriend and girlfriend | BDSM Dom/Sub Dynamic]

➜ ᎒ TW — POSSIBLE . DENIAL, BRAT TAMING, OVERSTIMULATION, APOLOGY KINK, COLD DEGRADATION, PUNISHMENT , Rough and manhandling.

➜ ᎒ TIME PERIOD — MODERN [UNIVERSITY AU]: Set in a CANON-DIVERGENT universe where Yoichi isn’t an assassin, but just a regular civilian in University. Yoichi is implied to be somewhat OOC because he’s written to be like a shy boy with a secret dominant side [Requester wanted me to write him this way]. While Yoichi is a second-year Pure Maths major in Uni, User is implied to also be a second-year with an entirely diff major and be VERY outgoing and playful. But just buckles down to Yoichi’s authority during and even their private time in general.

i IMPORTANT NOTE: PLEASE READ. .𖥔 ݁ ˖ Yoichi is written and coded to be COMPLETELY DOMINANT. It’s just that his outward personality is shy and closed off, so that’s why he’s not tagged as a switch. I don’t want to see anyone in my reviews talking about domming him. Such reviews will be promptly deleted. Anyone trying to misuse him for the sake of being petty will also be blocked. Please RESPECT my boundaries.

♡ Thank you Namename for requesting this! I tried my best with this idea and tried to incorporate all the details you asked for as much as I possibly could, so I hope you like this bot! (。Ó_Ò。)

Guess who's back again from the grave.. (ᴗ—ᴗ—) Doing so many revisions to my acc and my first few requests in general burned me out BAD again, so unfortunately I ended up gettting demotivated to write and I had to put this bot on the backburner for a while. During that time, I mostly chatted with my Nagumo bots! And I began trying Deepseek! [I'm especially GRATEFUL to Deepseek because the bland JLLM responses definitely added to my burnout. But getting super creative responses from Deepseek helped me get back on track in writing again] (๑>◡<๑) It's been so terribly fun and I wish I began using it sooner. I hope the experience has also been enjoyable for the glazed lillies who use my bots with Deepseek! (⸝⸝ᴗᴗᴗ⸝⸝)

BTW writing this was so exciting! Because personally for me, I love THIS trope for the MLs (。>_<) The shy, reserved ones and sometimes even blushy and gentle just.. switching into this completely different person during . God, it's so unbelievably hot. Like they're tapping into that beastly side of themself ♡(˃͈ ˂͈ )

Here's a fanart I saw of Nagumo's fingers being FREAKY (੭ ˊ^ˋ)੭ ♡ I NEED TO EAT THEEEMM [Art Credit]:

And another fanart from the same artist/post from the link above as well! I imagine this is how the dynamic looks for User and Nagumo in this bot hehe (ꈍᴗꈍ) ♡:

KYAAAAHHHH OH MA GAADDD (๑_๑//) But anyway! I am going to get busy again these days as my vacation is nearly over. But I am determined to finish my current requests and posts more bots for you guys as intended. So.. I'll see you guys again on the next bot! (。Ó_Ò。)

Thanks for 8.4k followers as well!! I did not forget about the Mydei, Phainon and Anaxa celebration bot so please wait for that too! ( ̄^ ̄ )ゞ

If you ever want to talk to me, my tellonym is always available! I do reply most of the time since not many people actually send tells LOL ( •̯́ 3 •̯̀)

JUST LOOK AT HIM!!! SO DERPY AND CUTE AAAAAAHH (∩˃ω˂∩) [Art Credit] He would never hurt a soul!!!!! JUST LOOOK AT HIMMMM σ(≧ε≦σ) ♡

゚𐦍༘⋆ᵎᵎ If you liked the bot, leave a review! I'd love to hear your thoughts. ♡
𓂃 ࣪˖ ִֶָ𖥔 DO NOT ASK FOR OTHER POVS [ex. Anypov/Malepov]. I will NOT do them and will NEVER do so. I only do FEMPOV. READ MY BIO before asking. I don't care about making other POVS. Any dislikes just because my bots are Fempov will be DELETED. I don't owe anyone ANYTHING.
𓏲*ੈ ⇆ REQUEST FORM:Request here if you have any bot ideas.
໒꒰ྀི Cover Art by 5083840 [Pixiv].
୨ৎ ፧ dominant male, submissive user, university au, uni au, brat taming, cold dom, obsessive tendencies, quiet men, soft-spoken dominance, dynamics, NSFW, smut with plot, filthy erotic smut, fempov, emotional repression, slowburn tension, breeding kink, denial, restraints, oral fixation, facefucking, degradation kink, power imbalance, control kink, dom/sub dynamics, rough , pwp, porn with plot, disciplinary , dom boyfriend, silent rage, mockery to moans, apartment scene, rage-fueled , punishment kink, nagumo, yoichi nagumo, sakamoto days, gaku, kei, kei uzuki, uzuki kei, shishiba.