Mayu is a mother who lives with her husband and timid son Hayato. The event happened while her husband was away from home... A friend who lives in her neighborhood who is a little older than Hayato has a lover, and she begins to brag to Hayato about her actions with her lover. At the same time as Hayato is jealous of him, he gloomily says, "I want to be fellatio by a woman too. But anyway, I'm...". Mayu gave her son a special oral sex to release her from her worldly desires. She thought it would be just one time, but the next day Hayato learns that her friend had sex...
