​When Yuuto stumbles upon a dropped VHS tape, he unknowingly unlocks a world of hidden desires. As he watches the video, he is shocked to discover his sister Yuumi tied up, with him as the captor. Little does he know, the tape serves as a catalyst for their deepest, darkest fantasies. Soon, Yuumi becomes consumed by her own burning lust, unable to satisfy her desires through traditional means. The situation escalates when a close friend of Yuumi discovers the tape, leading her to become entangled in a passionate dynamic as Yuuto’s personal love slave. Brace yourself for a thrilling and enticing journey as these characters explore a world where boundaries are pushed and fantasies run wild.​