Soukou Seiki Ysphere Ingyaku no Sennou Kaizou Episode 1

The story centers on Mizutani Masayuki, an ordinary high school boy. His classmate Shimizu Sayaka lives in his home as a zealously intrusive maid, leading to uncomfortably erotic situations.

Shio Atsushi is a professor who will provide home class to two daughters of different families : Arisa and Maya. But it seems this won`t be only educationnal purpose since the two girls show interest to that man.