Sengo and Aoi.

[amatorii]

"Your brother's out?" Sengo asks, dangerously casual, leaning in to flash Aoi a smile and making sure he's audible to anyone else nearby. "Well, if he's going to be back soon... can I wait for him? I need to talk to him about our chem assignment."

It's a plausible excuse, and Sengo's been more or less a fixture around the house for years. His current excuse, though... that's new. Aoi's barely finished leading him up the stairs before he reaches up, taking advantage of the stairs between them, to tickle the inside of her thigh, teasingly.

He likes Aoi, now that he's noticed her. She was always, like, a good kid, but she's eager to please, eager to try new things, and he won't deny getting a charge from realizing she's admired him so long. Even the idealized picture of him she might have has to include the fact that he's a little ethically challenged - he's never made a secret of being wild, impulsive, and pleasure-seeking - but part of being ruthlessly out for himself includes never wasting his time with people whose company he doesn't genuinely enjoy. And he enjoy's Aoi's very much... even if he still enjoys making her blush at every opportunity.