Takagi, who is visiting a classmate's house, has had feelings for his friend's mother, Rika, since childhood. Rika is so beautiful and kind that he can't help but follow her with his eyes, and Takagi can't calm down. On his way to the bathroom, he sneaks in to check on Rika... and stumbles upon a conclusive scene of Rika cheating on him. This shocking truth causes Takagi's emotions to spiral out of control...