Kimi no Na o Yobeba 1

Based on the manga by Amazume Ryuuta.

There are young women that work at elite schools to satiate the sexual desire of its students, in an effort to prevent possible sexual crimes. The reasons for young women to take on such a "career" are various, ranging from debts to crimes some have committed. While working, they don't wear clothes and are called by number, their names are unknown to anyone...