Impulse Control (Yagami LightxReader)

14

You have never seen this woman in your life, and by the looks of it, neither has Sayu.

After snatching her eyes off the floor and resetting her jaw, the brunette blazed up the stairs, her light lilt antagonizing the groundbreaking steps she made. "Uh, just a moment! Light! Liiight!"

You, au contraire, stood there dumbly on the other side of the door. You weren't sure if it was in your power to invite her inside, considering you weren't a resident of the house. But you and this chick staring at one another in silence as Sayu persuaded her brother downstairs wasn't your idea of a good time.

"Would you..?" you side-stepped, allowing her enough space to enter. Instead, she stepped back, shaking her head heartily.

"No, thank you." Maybe you had, in fact, seen this woman before. Something about her seemed familiar, the same way a passerby—however innocuous—makes a trace impression in memory. "Misa can wait out here, until Light invites me inside.."

For someone who you had only possibly seen in passing, she was making a point to only call Yagami by his first name. "That's fine. What class was the notebook for?"

"Oh! Um!" She stiffened; paled. Though she dipped her head down, and patted her backpack and areas of her dress that would hold pockets, no notebook was produced. More, she made no effort to produce a notebook. "Algebra?"

"...Linear algebra?" You clarified. A sudden smile broke apart her lips, and she nodded enthusiastically. Yagami didn't take linear algebra, he took analytic geometry and calculus.

Her hair was the same length, texture, and color as those you collected from the tapes the mock Kira sent it. And she had a notebook to return, from a class Yagami doesn't take. "Right. Then, if you don't mind waiting outside."

You shut the door right as Yagami reached the foot of the stairs. Sayu took no time absconding—in valiant quest, you're sure, to locate and gossip with her mother about the new arrival. "[L/n]? Who was it?"

You turned to him, and there must've been something in your eyes that gave it away, because his already cautious mien took a turn for the worst. "Are you sure?"

"Very," you said. "Female. Blonde, medium-length hair, colored contacts... 152 centimeters, maybe 36 kilograms? Hell, I could take her if this really turns to a foray."

"No need." Yagami stepped in front of you, hand on the doorknob. "Wait here. I'll check."

The student opened the door enough for him to squeeze through and swiftly shut it behind, leaving you feeling like a dog he didn't want forcing its way outside. And, like a dog, you stood a hair's width from the entrance, ear pressed to the polished oak, peering through the glass which embellished the edges, foot tapping twice or thrice for every second that passed.

You had to jump away from the door when it at last opened. Yagami came in with Amane borderline yoked to his heels, glowing. His countenance looked like one you'd expect to see at a funeral, as opposed to locating an ally. He gave you a short nod, and called his mother over. Never too far from her, Sayu also reappeared.

"Mom, she came all this way to return my notebook to me." He dragged himself up the stairs as he spoke, eyes meeting neither yours or his family members'. "Could you make us some tea or something?"

Mrs. Yagami, in the face of a callous request from her golden child, could only nod her head, however weary and worn she appeared. Amane bowed once to you, Sayu, and the female head before following Yagami. "I-.. I suppose I should."

A shade of sympathy, intermingling with a vague, portentous conception that you shouldn't be upstairs with those two, roused you to offer yourself up for assistance. "Ma'am, might I abet you to-"