Hashimoto sneaks into the house of a dirty old lady who is the subject of rumors among the students in the neighborhood that "she'll have sex with you if you ask her," to find out the truth about her. But the person who comes out is Yugako, a chaste mature woman who knows nothing about her. When Hashimoto returns home disappointed, his classmate Hirai is also curious and sneaks in alone. There he finds Yugako writhing in pleasure as she masturbates. Unable to contain his excitement, Hirai confesses that he's a virgin.