I was intrigued by the true nature of a woman named YU. Her ever-present innocent smile seemed to hide something beneath the surface—I couldn't believe it. I sensed that behind that pure demeanor lurked some lewd intention. I reached out to Sugawara. He was my cunning friend, skilled in handling women, with a long history of training them. He always said every woman was a bitch at heart, only revealing her true self when properly trained. I agreed with him completely. To uncover YU's real nature, I needed his help.