Rika

In a seemingly ordinary household, 12-year-old Nishizawa Kazuya appears to be the epitome of a well-adjusted middle school student. As the fastest runner in his school and a child who excels in various activities, Kazuya's parents and peers view him as responsible and diligent. However, beneath this façade lies a secret that Kazuya dares not reveal to anyone. Every day, he indulges in a peculiar habit - secretly observing his younger sister, Rika, as she undresses. This clandestine behavior has become an integral part of Kazuya's daily routine, one that he struggles to conceal from the rest of the world.