Ponkotsu Fuukiiin to Skirt Take ga Futekisetsu na JK no Hanashi

Sakuradaimon-kun is an overserious class monitor whose duty is to make sure other students are following the school dress code. His primary target is Kohinata-san, a troublemaker with light hair and a miniskirt. At first, she couldn’t stand the annoying Sakuradaimon-kun, but after learning that he’s a massive klutz, she has a change of heart…?!

(Source: K Manga)