A girl disguises herself as a boy to chase her idol, then has to actually live that lie in an all-boys dorm while falling for him in real time. The show spends zero energy on whether her cover will hold, it's about the impossible math of loving someone while pretending to be someone else. Every moment she almost gets caught, every conversation where she has to swallow what she actually feels, every time Sano gets closer to the real her without knowing it exists, that's the actual tension. The comedy comes from her doing parkour around her own heart. Romance built on a secret this deliberate doesn't resolve when they kiss; it resolves when he knows her actual name.

Mizuki Ashiya is a Japanese-American track athlete who has idolized high jumper Izumi Sano ever since she watched him compete. When she learns he attends an all-boys high school, she leaves the United States for Japan, disguises herself as a boy and enrolls to be near him. The problem arrives immediately. By luck she lands in Sano's class and even his dorm room, only to discover that he has quit high jump. Undeterred, she sets out to learn more about him and to reignite his passion for the sport. Meanwhile she must guard her secret in class, in the locker room and in the bedroom they share. Every close call risks exposure. Her presence also leaves some classmates, and the school nurse, questioning their own feelings. Comedy and heartache collide as she tries to keep her cover intact while getting closer to the real Sano.