Mayu is a mother who lives with her husband and her timid son, Hayato. This incident happened while her husband was working away from home... A friend of Hayato's who lives nearby and is a little older than him, got a girlfriend and started bragging to Hayato about the sex they had. Hayato is jealous of him and at the same time, he becomes depressed, thinking, "I'd like to try having a woman give me a blowjob too. But I'm no good anyway...". Mayu gives her son a special blowjob to free him from his worldly desires. It was meant to be a one-time thing, but the next day Hayato hears that his friend had had sex...