Shirogane Sakura, who is ignorant of naughty things, is a naive girl who believes that “a baby can be made with a kiss.” In order to know the meaning of the club members’ naughty conversations, she poses a question to Kuroda-sensei and asks for their direct guidance…

Kumiko Aoyama, captain of the lacrosse club, visits his apartment to check on Kuroda, who has not been able to come to practice for a week because of a cold. Aoyama, who was excited by the dense smell of her first man’s room, was lured into more than she bargained for…