Yuka who has raised her son Kosuke with one female hand. - She had wicked feelings for her son, who gradually resembled her late husband, but shed her unfulfilled desires within herself. - On the other hand, Kosuke secretly had more affection for her mother than her parents, but she hid it and spent her daily life. - However, on the eve of his marriage, Yuka peeks at her masturbation and gently squeezes her bulging cock, saying, Because its the last night I spend with her mother and child .... - However, the two who couldnt fit in that alone couldnt stand it and were driven by the contraindicated lust ...