Kazama Maruo no Yuuutsu

Maruo, a prudish public morals committee member, is having a hard time dealing with a pair of busty gyaru sisters named "Riru" and "Ruri" who completely disregard the rules!

For the sake of enforcing public morals, Maruo also watches them after school intending to obtain conclusive evidence, but he gets busted by his obvious way of tail...