Kagami Yuuki has achieved a scholarship to attend a prestigious high school. However, due to his name being gender-neutral, his teacher Kakinozaki Ayana has accidentally registered him as a female student. Despite efforts to correct the mistake, Yuuki is now obliged to reside at the co-ed girls' dormitory.
Fortunately, Ayana takes responsibility for the confusion and offers to share a room with Yuuki. To avoid any suspicion from the other female students, they must ensure Yuuki portrays himself as a girl at all times, except during class. Failure to comply could result in expulsion from the school and dormitory.
