When her husband suddenly collapses from a seizure, Hotaru is left distraught until her neighbor, Hirai, happens to pass by. He administers the proper first aid, saving her husband's life. This event sparks a new relationship between them, but... Hirai, a student studying for university entrance exams, views Hotaru merely as an object to satisfy his sexual urges and takes this opportunity to get closer to her. Taking advantage of her kindness, he forcefully pushes her down... Despite the force, Hotaru is bewildered by the pleasure that resonates deep within her body. While her heart rejects Hirai, her body craves his cock...
