Shiritsu Onsen Gakuen 2-Jikanme ~Ofuro de Lez Shicha Dame Desu ka?~

There is a prestige girls' school. Granting a founder's intention, there are baths on the school premises and students enjoy having a bath. But one day, a woman, who used to work at the school, comes back. Her name is Reiko and she says, "Do not have a bath in a pair." This actually means "prohibision of lesbian". Sayaka orders the main character, a rookie teacher, "Please collect petitions to stop it, or you'll be fired...."