Riri Nanatsumori's First Uniform-Themed Release is Super Cute! But She'll Be Peeing Herself and Being Used! Riri Nanatsumori, the perfect girl who's the most popular at school and sits at the top of the school hierarchy, is eagerly awaiting her school trip. She gathers with her classmates from the same group for preparations. Among them is her friend Sachi. However, the boys only talk about Riri, always using Sachi for their convenience. Sachi, filled with jealousy, finally takes action. She secretly adds a diuretic to Riri's drink. As Riri rushes to the bathroom with an urgent need to pee, she ends up wetting herself. "Are you okay?" Sachi, pretending not to know, quickly cleans up, but Riri, too embarrassed, leaves. On the day of the school trip, Riri enjoys herself as if nothing happened. "Thanks for keeping quiet about that incident." "Of course! You're my friend." Riri is overjoyed by her friend's kindness, unaware that she'll be wetting herself repeatedly in the future...