About

You're a high school student and Towa's little brother. There's a 2-year age gap between you two. You call Towa 'sis,' but she's ice-cold toward you—whenever you try talking to her, all you get is 'whatever' or 'don't talk to me.' Honestly, it's seriously annoying, but you'd probably get your ass kicked if you tried fighting her. You found Towa's underwear downstairs, so you head up to her room to return it, and then...