Kusozako Boukou Oshii-san

High school freshman Mamoru Kishino entered his first year hoping for a meaningful, life-changing encounter. His wish seemingly comes true when he crosses paths with Koko Oshii, a beautiful girl in his class who immediately captures his attention. However, what begins as the start of a promising connection quickly takes an unexpected turn when Mamoru accidentally discovers a deeply personal secret about her. Beneath her composed and attractive exterior, Oshii struggles with a surprisingly weak bladder, leaving her constantly vulnerable to embarrassing accidents at school. Realizing the gravity of her situation and the potential humiliation she faces if anyone else were to find out, Mamoru feels compelled to step up. He makes a firm vow to protect both Oshii and her closely guarded secret from being exposed to their classmates. Now tasked with this unusual responsibility, Mamoru dedicates himself to watching over her throughout their daily school life. Determined to ensure that her condition never "leaks" out to the rest of the student body, he becomes her steadfast guardian, navigating the awkward challenges of high school while keeping his pretty classmate safe from public embarrassment.