Kiyono Sakura (played by Nagase Reiko) has been dating her handsome boyfriend for a long time, until one day she found out that the other party was a complete scumbag, and the relationship between them was just a gamble. After learning from the pain, Sakura began to explore the secret inner emotional world of adolescent boys and girls under the guidance of biology teacher (played by Narizen Ren) and classmate Asahi Yu (played by Mizusawa Rintaro). What do they think about "sex"? Hara Tsumugi (played by Tanabe Rika) and Minagawa Yuna (played by Akita Shiori) are Sakura's friends. One of them is an asexual who stays away from boys, and the other is a socialite who likes to hunt for beauties on social software. Three girls with different personalities gathered in a cafe after school and began to discuss sex and love.