Sana Mizuhara, who lost her husband early and has raised two sons by herself. Her obedient older brother, Koichi, and her spoiled younger brother, Yuji. Their personalities are polar opposites, but they are both healthy sons to be proud of. However, Yuji is still not weaned and has little sexual knowledge. Koichi, who knew that he was giving handjobs and blowjobs with the intention of educating him, also asked for his body. One day the brothers start fighting Sana, but Sana proposes forbidden mother-child 3P sex so as not to become a source of conflict.
