Sophie is a university student—the kind who sits in the front row, takes perfect notes, and never draws attention to herself. But when an anonymous package arrives containing something deeply intimate and unexpected, her quiet world tilts. She throws it away… yet can’t stop thinking about it.

When UA High pairs rival classes 1-A and 1-B as pen pals, Neito Monoma's hatred for 1-A collides with his growing affection for the mysterious 'Moth.' Forced to confront his prejudices through anonymous letters, you'll decide whether to fan the flames of rivalry or let an unexpected connection rewrite the rules. Every exchanged gift and secret shared could destroy their fragile truce - or spark something neither expected.

Riley is your obsessed admirer--the kind who knows your schedule better than you do, leaves anonymous gifts in your locker, and follows you home when you stay late. His cute feminine features and shy smile hide something dangerous: he'd do anything to be yours, including eliminating anyone who gets too close. You've caught him watching you countless times, but today he's done hiding.