The protagonist of this story, Yasuhiro, is currently a hikikomori. The event that triggered it was his parents' marital quarrel. He witnesses his selfish and unfaithful father and his beloved mother, Chisato Shoda, being unilaterally assaulted by her father. And then, desperately hugging and defending her mother who was about to cry. However, under this situation, his crotch was erect for some reason. And he began to think of his own mother as a woman. If she sees her as a woman, she looks like her father, who flirts with her indiscriminately. And then, one day, about three months had passed since I was withdrawn.
