Momoka Onigawara wants to have a fulfilling high school life without anyone finding out her embarrassing secret – her family are oni, with their horns popping out when they get flustered. She reunites with her former childhood friend Ren, who wants to make a movie to one-up his famous director father. After they find out that the script he seeks was originally written by Ren's father, Momoka's father, and Momoka's dead mother when they were high schoolers, they decide to live out their youth by making the movie.

One day, Genjiro invades an art school and destroys the equipment, and at the invitation of Kano, a girl who devotes himself to the dance he meets there, he decides to practice hip-hop duet dance. For the first time in his life, he graduated from the yankee and started working towards a group dance announcement with his rivals with his fists.

This is a coming-of-age story set in a closed-off rural area in the Heisei era, depicting the summer spent by Mishima Futoshi, who has just realized his identity, and the boys around him. Mishima, who was bullied by his classmate Kirino Makoto, made it a daily habit to secretly apply lipstick and wear women's clothes. One day, he witnesses Kirino trying to apply lipstick to his lips that he had lost.

The head of the police force's National Public Safety Commission, Chairman Shuma Kumon, transforms into Kamen Rider Mugen! What is his true purpose?! Plot TBA.