Black School Rules (2019)

Sora is a high school student, but feels virtually invisible at school. His friend, Chuya, does unpredictable and surprising things and has a completely different personality than Sora, but they both like the same girl, Kio. In their pursuit of her, they take a stand against their school's unreasonable rules, which require all students to have black hair -- and the object of their affection has brown hair and refuses to change it, so she won't attend school. Based on the anime series of the same name.