Mitsuhashi Ikaruga works as a building security guard in Akihabara. His enthusiasm for his otaku hobby has died down and he spends his days aimlessly. His only hope for each day is Tsuruko-san, a maid at a maid cafe in the same building. Every time he sees her, he feels ecstatic. One day, she herself finds out that he has been masturbating to her. However, she still continues to treat Ikaruga with an unnatural tenderness - and he is not the only one. Trauma and distorted love are intertwined in this suspenseful tale of sexual perversion.