A/N: Welcome to my version of completely public self-indulgence. AKA, shipping for the sake of shipping and writing about it despite the non-activity of the fandom XD

I .

Yokoi had thought that there would nothing more irritating than sitting next to Seki-kun, and his toys and games and general Seki-kun-ness. But oh no, the universe wanted to prove her silly assumptions wrong. And while no, she wasn't sitting next to Seki-kun in her university, and no, they didn't have any classes together, all of those factors were null to the plain, simple fact that:

She was neighbors with Seki.

Dorm neighbors.

(She should have gone to the all-girls dorms instead. Why didn't she go to the all-girls dorms instead?)

Upon seeing her one morning, that dreaded morning where she was rushing against the tides of time to finish a project her groupmates were procrastinating on, the door next to hers opened to reveal a shocked face right before she skidded to a stop next to him.

"I'm sorry!" Yokoi apologized, the words tumbling out from her lips in a rush, before her stressed mind finally caught up to recognize the face she was staring at in close proximity.

Seki-kun. Toshinari Seki-kun.

His green eyes widened at the sight of her gob smacked face, and there was the thought of oh god why flitting across Yokoi's mind before she rallied and stepped away from him hastily, tossing another apology to him before she rushed out. Not because she was embarrassed (because she wasn't) but because her deadline was closing in on her, and she didn't have time to waste.

She was a whole new Yokoi now! She wouldn't get distracted with Seki-kun's foolishness!

II .

The sound of quiet explosions were easily excusable.

Weren't they?

No, no, they were.

Yoki gave a weary glance to the wall on her left, knowing that it was the wall she shared with her former seatmate.

They could be from a show, or a video, or a small, contained chemical explosion.

But that would be ridiculous, because dorm inspections happened too regularly for Seki-kun to be able to pull something off so extravagant in a place where he couldn't store materials like his actual room did.

Ridiculous.

(Just like it would be ridiculous for a person to construct entire battles in class, right?)

Oh god, she needed to know.

Yokoi managed to push out her seat from her desk before common sense kicked her in the brain and forced her to sit down again. Right, she was a new Yokoi, and she had new responsibilities and things she had to do and she couldn't afford to get distracted by Seki-kun's nonsense like in highscool! This was college. Everything was serious now.

Right.

Yokoi settled into her seat before picking up her pencil again. She had a quiz to get ready for.

There were several knocks on the wall.

Seki-kun probably just knocked something over.

There was another. This time in an unsteady rhythm, accompanied by the faint sound of water splashing.

Dynamite fishing? That's horrible! Think about the earth!

There was the sound of another explosion, and this time Yokoi could clearly hear the water splashing everywhere. There was a thud on wooden floors, and Yokoi grimly hoped Seki-kun had slipped on something.

A quiet meow.

Good god, she really couldn't study like this!

Yokoi pushed out of her desk and got up from her chair with a purpose, striding towards her door and out to the hallway to knock on Seki's, her foot tapping on the floor impatiently.

There was a pause before she heard faint footsteps coming to the door in quick succession, and the knob jiggled briefly before Seki-kun's plain, grey door swung open to reveal Seki-kun himself.

He blinked.

She glared.

He winced and tried to cover her view of the inside of his room with several flailing limbs. A futile move, as Yokoi gasped in horror at the scene of crime behind him and (rudely) pushed past him to cradle the robot family's son in her hand.

He was covered in red, and Yokoi gave a wincing Seki an inscenced stare.

"What," she hissed with all the rage of an offended mother, "Did you do?"

Seki raised his arms in a placating gesture, nevermind all the red staining his shirt and the wooden floor and—

Yokoi swallowed back an irritated sigh and looked at robot son. The plastic, the part that had been white, were now stained pink.

Slowly, ever so slowly, she turned her gaze back at Seki, who inched back and away from her with a cringe that conveyed discomfort, and also fear but that was beside the point.

Yokoi pointed at the reddened floor and left the room before quickly coming back with a mop and handing it to him. Seki blinked, because she was terrifying at the worst of times, but got the message.

He carefully placed the mop on the floor but didn't do much more than that. Instead, he let his eyes follow her as she flitted about his dorm and wiped down robot son with a sort of motherly care that some distant, mostly mute part of his brain found appealing. Then she located the rest of robot family and placed the son between his parents, giving the completed picture a happy smile.

Seki, who had begun to mop because erasing evidence of his adventures was a vital part, ducked his head and smiled.

III .

Yokoi observed the crime scene.

Detectives? He was playing detectives?

Yokoi hummed and gave the mini pool another round of intense scrutiny. The reddened mini-pool, the crack on the floor and the broken diving board made little sense, but…

Oh, she thought, maybe robot son was…sabotaged?

There were small bits and pieces of metal within the water, and slowly, ever so slow,y she pierced together picture that had her gritting her teeth.

So, someone planted a bomb in the water to…to…kill robot son! But why?

There was a tap on her shoulder and as she turned Seki was already moving out the door, mop in hand. Miffed as she was, the movement had her noticing the numerous, small medals on robot son's desk.

She gasped.

She understood all too well now, revenge motivated by jealousy. But it was't right, wasn't justified, and really—

"Yokoi-san?" someone's voice echoed out to her, and for a moment she couldn't recognize it but.

Seki was standing at the door way, looking at her with his head tilted to the side and his eyes creased in a way that exuded amusement, "Your phone is ringing."

Oh.

Yokoi stood up, brushing down her skirt and went to her room, passing by a Seki and the same amused smile he usually made whenever he teased her.

Yokoi huffed, closing the door behind her, but not with any actual force while Seki, outside, mostly grinned to himself as he closed his.