Yuriko (Mikumo Yuriko) was desperately resisting her son who screamed and attacked her. From the moment she was spotted taking a bath, she knew her son was acting strangely. But I can't believe I'm so lustful for my mother's self... There is no way to resist the physical strength of her son who has grown into an adult body, and Yuriko eventually gives up on her resistance and makes a proposal to cross her line anyway. "Mother will teach you how to treat a woman." Thus began Yuriko's sex education for her child.
