Iron Bar High School enforces strict hair regulations—so strict they're ironclad. The moment anyone breaks the rules, the teachers' clippers start dancing. Amidst this oppression, a long-haired troublemaker ‘transfer student’ and Kwon Gi-Su, immune to the clippers, fight to change the rules and reclaim their freedom.(Source: Naver, translated)
— Description from AniList community (anilist.co).
