This time's main character, Yasuhiro, is currently a recluse. The event that triggered this was a quarrel between his parents. He witnesses his selfish and unfaithful father and his beloved mother, Chisato Shoda, being unilaterally assaulted by her father. Then, he desperately hugs and defends his girlfriend's mother, who is about to cry. However, under this situation, his crotch was erect for some reason. and