Momotaro and Hidemaro are 1st-years at Otokojuku, a private boys school where true men are made. Momotaro, proficient in academics and martial arts becomes good friends with Hidemaro an underachieving weakling. Omito Date, former student leader, plans his revenge against his former school. Now leader of an evil army from rival Kanto Gogakuren school he fully intends on taking over Otokojuku.

Keiko, a young, newly hired weather woman, is eager to give her channel's flagging ratings a boost. She decides a panty shot might do the trick, so during her forecast she lifts her skirt, thereby capturing the attention and the hearts of viewers. Keiko's stunt creates such a stir of excitement over the weather report that viewers begin religiously turning in to see what she'll do next. However, this showboating routine earns the ire of Kaori, the beautiful and ambitious daughter of JTV's chairman. Jealous of her success and aching to take over the weather report, Kaori is willing to do just about anything to get what she wants.

In Tokyo, the new type of virus called Emanon has spread out. Once people infected by the virus, they lose their most important person's memory. Teru, a guy who spends his life lazily, met his previous girlfriend Mio. But she has infected by the virus and forgot about him. Because of the virus, the world has plunged into confusion and it's been growing as a global pandemic. In the meantime, Teru and Mio restarted their relationship but he also infected and lost the memory about Mio. Tokyo fall into a turmoil and shattered. Teru and Mio ended up in the countryside where they've been before.

Fuyuko (Tomoko Nakajima), begins the film nine months pregnant, but doesn't deliver until her third year, to the bafflement of all around her.

Keiko, a young, newly hired weather woman, is eager to give her channel's flagging ratings a boost. She decides a panty shot might do the trick, so during her forecast she lifts her skirt, thereby capturing the attention and the hearts of viewers. Keiko's stunt creates such a stir of excitement over the weather report that viewers begin religiously turning in to see what she'll do next. However, this showboating routine earns the ire of Kaori, the beautiful and ambitious daughter of JTV's chairman. Jealous of her success and aching to take over the weather report, Kaori is willing to do just about anything to get what she wants.

A young man awakens in the hospital after an accident wipes his memory. Fascinated by a textbook full of drawings of dissections, Hiroshi is drawn to medical school. There he catches the eye of a fellow student, but it's another who becomes his obsession: the dead woman on the cadaver table.