[Mosaic removal] Yuka who raised her son Kosuke single-handedly.While harboring wicked feelings for her son, who was becoming more and more like her late husband, she was venting her unfulfilled desires within herself.On the other hand, Kousuke also secretly loved her mother more than a parent and child, but he hid it and lived her daily life.However, the night before his marriage, Yuka, who peeked into her masturbation, said, "Because it's the last night to spend with her mother and child..."However, the two people who can't settle with that alone can't stand it and are driven by contraindicated desires...