Because Uemura Aoi (Riko) was tired of her parents who argued all day long, she went to live in seclusion at her grandmother's house during the summer vacation of her third year of junior high school.She met a young man of the same age, Tachibana Iori (Kazuto Sadai), in a small planetarium in the town, and fell in love for the first time.Ao decided to confess to Iori before the summer vacation ended, but because he “ missed ”, he thought he was dumped. From then on, the two never saw each other again.
Three years later.Ao, who became a third-year high school student, took the opportunity of his parents' divorce to transfer to his mother Haruka's alma mater (Ryoko Kuninaka).This is an elite school with internal admission to college.In the classroom of Class C of the third year, he met Iori again like fate——.
Ao avoids Iori because of embarrassment, and at the same time, she is invited to work part-time by her classmate Sasaki Masuzu (Tanaka Mihisa).In order to help the family, Aang followed Zhen Ling, but found out that it was her father's job.When she felt in danger and wanted to run away, Iori stepped in to help her.In order to resolve the misunderstanding from three years ago, Yi Ribbing took Cang to the night school.There, Iori shows Ao something...!? Ao and Iori's first love is rekindled.However, classmate Takanashi Kotone (Akita Shiori) who holds a certain secret hinders their love.
On the other hand, Haruka, as a guardian, reunites with his former lover Tachibana Yutaka (Takezai Terunosuke) and his friend Tachibana Kyoko (Sakai Miki).Haruka also rekindled the love she was supposed to let go of.
First love is rekindled and begins to take action. The incest between high school students and their guardians begins. The unheard-of suspense of campus incest begins!!