While her sister and her husband are away on a trip, Asako is left to look after her nephews. The joy of reuniting after such a long time is short-lived, as her brothers' rough voices, now grown up and with puberty, reverberate in her womb, and Asako's hungry body can no longer suppress the throbbing. That night, she visits her nephews' bedroom and approaches his strong, grown-up body... The second son, who has peeked on the secret between his aunt and his brother, comes to see Asako while she is taking a bath the next day. There, Asako, who understands her second son's feelings, says, "I'll give you something that feels better than your brother..."