Tormented by the nightly sounds of his brother and sister-in-law having sex after they move in, a man finally reaches his limit and has a wet dream. Worse, his adult niece Hikari catches him in the humiliating aftermath. He knows he cannot continue like this and needs to find a chance to relieve himself, but then Hikari unexpectedly offers to take care of his sexual frustration. Half of her proposal comes from feeling sorry for him and half from her own curiosity about sex. Though he initially resists, his restraint eventually snaps, he accepts, and a strange taboo relationship begins. A live-action adaptation of Anchu Mosaku's breakout work, which quickly sold more than 10,000 copies.