Hirugao

Haru Aiba, the young heir to the long-established hot spring inn Aiba-en, has a secret obsession: spying on his mother during “that act.” As she surrenders herself to pleasure, she changes from a refined woman into something far more primal, her sweet moans filling the room. The inn’s head maid, and even Haru’s father who only comes home occasionally—watching the adults’ “daytime faces” and their “nighttime faces” stirs something dangerous in the boy’s heart and body…