Netorare Onna Kyoushi 寝盗られ女教師－美幌先生日誌－

Akira is now hopeless about his school life because he gets to know that Mihoro, his favorite teacher, has a fiance. She will be owned by someone unknown soon...!

One day, Akira is given a magic book from a stranger. According to the stranger, he will be able to control the hearts of the girls with the book. He doubtfully casts a magic on Marie, a teacher/Mihoro's older sister, and she starts taking off her clothes as he orders....