One day, Hotaru's husband collapses suddenly from a seizure, and the neighbor, Hirai, who happens to pass by, takes appropriate action and saves his life. This incident begins their interaction, but... Hirai, a ronin, sees Hotaru as an outlet for his sexual desires and takes advantage of the situation to get closer to her. He takes advantage of her kindness and forces himself on her... Although it was against her will, Hotaru is bewildered by the pleasure that resonates deep within her body. Even though her heart rejects Hirai, her body craves his manhood...