Ryusei Kaburaki, a protagonist with a penchant for cooking and a tendency to worry, is suddenly bundled into a black car on his way home from school one winter afternoon.

There, he reunites for the first time in three years with his cousin, Runa Kaburaki—a girl who looks so much like him that anyone would mistake them for twins.

Runa is the heiress to the wealthy Kaburaki family and attends "Shirotae Girls' Academy," one of Japan's most prestigious schools for young ladies.

Within the school, she is the top student of the "Entertainment Club"—a special class gathering beautiful, talented students aspiring to become actresses and singers—

and serves as the "Prince" of the academy, taking on male roles in their stage productions.

Due to certain circumstances, Runa has lost the ability to speak whenever she steps onto the stage. She asks Ryusei to take her place,

leading him to cross-dress and enroll in the all-girls boarding school.

Within this forbidden sanctuary, secrets, misunderstandings, and romantic feelings begin to blossom between Ryusei and the girls.

Tested and working.