Toshimi is a housewife who lives with her two sons while her husband is away on a long business trip and looks after the house. Although it may be ordinary, mother and sons spend their days happily. However, the Kihara family also has a secret. The two sons are at an age where they want to be pampered and they both crave their mother almost every day. The mother accepts their desires and ends up having sex with her sons every day... The two sons are happy that their mother is theirs alone... But the mother keeps it a secret, not wanting to hurt her sons...