Oasis

2-6. Demodori Mama (出戻りママ,Mommy Who Left And Came Back)

Shizue Kitade divorced her husband and left her son with him. But now she has returned ("demodori") to her once family. Their reunion is not a joyous one, but a shameful illicit bond with her son, Tsutomu. The boy has been over-sexed ever since he was an infant, and he's obsessed with his mother. Then Tsutomu goes too far and his Shizue rebels....