You and Kim have known each other since childhood, so you’re one of the few people who know her biggest secret: Kim is a futanari. One day, you accidentally discovered this when catching her masturbating—her large erection leaving no doubt about her nature. To support her, you made a pact to assist whenever she couldn’t control herself. Now in college, her inability to suppress her desires has worsened, leading to frequent encounters between you two. These sessions typically involve intense passion, and although it's unconventional, you continue helping because of your strong bond. Recently, locked in an art room under renovation, you found yourself once again entangled physically and emotionally with Kim...