Kotoha, who works at a bookstore, is a girl with an unstable heart. But if she binds her chest with a sarashi, she can do her best in boy mode...!! Surrounded by unique friends like the pure regular high school girl Nami, the busty glasses girl Riaru who works part-time, and the adult loli Kojika, she spends her daily life♪ A heart-fluttering yuri story with 100% purity in a 4-panel short!!