三日月まおは♂♀をえらべない

Mao Mikazuki, a 16-year-old girl, wakes up as a boy after a harsh breakup with her first boyfriend, who turned out to be deceitful. Her father reveals their family has a unique trait allowing them to switch between male and female, prompting Mao to choose life as a boy to avoid further heartbreak. Transferring to an all-boys boarding school, she navigates dorm life as a male, sharing a room with Ryusei, a cold and standoffish classmate. An unexpected kiss from another student, Sei, causes Mao to revert to her female form, throwing her into confusion. As Mao grapples with her shifting gender and new relationships, she faces the challenges of keeping her secret while dealing with emerging feelings and school life. (Unreviewed summary by Grok 3)