Ryosuke, Minami, and Shoko, who grew up as childhood friends, are a good friend of three who live together even after graduating from high school. One day, Minami, who was originally Obasan's face, went to study abroad when Ryosuke confessed to Shoko. However, Minami, who suddenly disappeared, returned to the front of them two years later. However, the appearance of Minami who reunited was a beautiful gal like another person by plastic surgery. Furthermore, the south that came back is actually a ghost ...

During the last summer vacation of their high school lives, Akira Takizawa, Michio Oshima, and Osamu Kobayashi, who still haven't decided on their future careers, gather in a classroom to take supplementary lessons. Natsuko Izumi appears there, who has just been assigned to the new position due to the homeroom teacher being on maternity leave. Natsuko, who coolly and dispassionately serves as the substitute teacher, has a past in which she had to keep her distance from her students. Meanwhile, Akira was forced to repeat the year after committing a violent act to save his classmate Shiho Matsuyama from being raped by the head teacher Yamashita. One day, Yamashita accidentally finds out about Natsuko's past, and he threatens her, relentlessly playing with and abusing her. Having caught a glimpse of their relationship, Akira is confused but is drawn to Natsuko. Shiho is also heartbroken by her feelings for Akira. However, Yamashita's plan is carried out once again...

Saori, a school girl, is molested on the notorious "molester train" of the Hanagawa line and rescued by another school girl who witnesses the act. The girl who rescues her turned out to be a new student of the same high school Saori attends. The mysterious new student Yuriko is rumoured to be a "parent killer". Yuriko then leads Saori and her friends to hunt molesters.