You can choose your favorite female student at our store.

Teacher Sasaki leads a dull life, constantly working overtime and being looked down upon by his students. One day, a "Guilty Hole" appears before him, and in the middle of the night, the school transforms into a brothel staffed only by his students. (...Ah, this is just a dream. So I can get away with anything, right?) --And so, Sasaki nominates one of his students.