Yu is forced into a relationship by Hashimoto, who lives in the same apartment building. She is taught the ultimate pleasure and her body is rewired to be unable to be satisfied by sex with her husband. This is no good... I have a husband I love. Although she knows it in her head, her body does not listen to her and desires Hashimoto. Her desire for pleasure gradually grows and becomes uncontrollable, eroding even the heart that she has stubbornly protected...