Itsuki doesn’t have any relatives, lost his memories and even has a fear of women. In order to overcome this fear which was causing problems in his adopted family, he was enrolled into the Saint Tiphereth Girl’s School as a girl. However, the model student Eri, who is known as the ‘Maria-sama’ of the school, found out about his secret. Since he also found out about her facade, they agree to help each other with keeping their secrets. In addition, she offered her body to him so that he can get used to touching a woman’s body.

With him spending lots of time with Eri, it was natural that other girls would be jealous of their close relationship. He soon had many enemies, but another girl vowed to protect him. She was Maya, the leader of the public morals group Chivalric Order of the Church where she was known as ‘Arthur’, and she was the only one who could rival Eri. With the two most charismatic individuals at school fighting over him, will it be possible for him to achieve the goal he came for?