One morning, Tooru, a son, wakes up from the pleasure of a wet dream. His mother comes to wake him up as usual. Tooru is unable to do anything with his soiled underwear, so he hands it over to his mother and goes to school. When his mother notices the stains on her son's underwear, she feels happy and says, "Tooru is at that age too," and the strong smell of semen ignites the flames of sexual desire she had almost forgotten. She then fantasizes about having a sticky kiss with her son and giving him a blowjob. Then, one day, that fantasy becomes reality...