Mesu Ochi! Kyonyuu Mizugizuma-tachi to no Love Ero Swimming! ~Pool de Kanshiin no Baito o Hajimetara Mizugi no Hitozuma-tachi ni Kakomarete Doutei Soushitsushita!?~

The protagonist is an ordinary college student. During the summer vacation, he is asked by his childhood friend's older sister, Misato, to work part-time at a swimming school. He gets to know the office lady Riku who is a customer, and the housewife Nanami who attends the school. The protagonist becomes close with them. Although he knows it's wrong because they are married women, he can't resist the attractive breasts wrapped in swimsuits and his own lust, and they become emotionally and physically intimate.