"I didn't know that liking someone hurts..." Due to a certain trauma, Heki has lost his sense of pain. In order to regain it, he searches clubs for a partner that can give him pain and pleasure through sex. Ruri on the other hand, plays the role of a serious college student by day but spends his nights in clubs. He's become known as a troublemaker of sorts due to his overwhelming strength. Heki declares that "Ruri is the only one who can give me pain!" and begins approaching Ruri aggressively. This is the story of how lonely Heki comes to know pain in the name of love.