Maho, his mother's best friend, is going to make dinner for his parents while they are away on a trip. Kenji falls in love with her beautiful face and tries to talk to her in an attempt to get closer to her, but his shy personality with women makes him lose his cool. Kenji is at a loss as to what to do, so he uses Maho's underwear as a masturbation aid while she is taking a bath. Unfortunately, he bumps into Maho after she has just gotten out of the bath, and he frantically apologizes to her, but for some reason, instead of getting angry, she hugs him...