Keyword School Rules

Sōra is a high school student who is basically invisible at school. He is friends with Chūya, who is an unpredictable character that often surprises those around him. Sōra and Chūya both have feelings for the same classmate, Kio Machida. The Machida girl refuses to come to class, because she doesn't want to dye her naturally brown hair black. Their school has unreasonable school rules, especially about uniforms, which include requiring all students to have black hair. Sōra and Chūya decide to stand up to change their school's black school rules so that Machida won’t have to repeat a year of school from missing too many classes.

A middle school teacher's life is thrown into turmoil when dozens of students dye their hair gold and his girlfriend suddenly proposes marriage, triggering a media frenzy and government intervention, forcing him to team up with the student mastermind behind the hair trend to navigate the chaos and confront his own journey from a jaded, reluctant adult to a mature, responsible one.

A class trip to the museum requires some new rules.

Sōra is a 2nd-grade high school student, but he is virtually invisible at school. He is friends with Chūya. Chūya's personality is completely different from Sōra. Chūya does unpredictable things and that surprises those around him. Sōra and Chūya both have feelings for the same girl at their school. The girl refuses to attend school, because she doesn't want to change her brown hair to black. Their school has unreasonable rules, including requiring all students to have black hair. For the girl that Sōra and Chūya like, they stand up to change their school's black school rules.