This work introduces a shocking story where a high-impact mixed-race beautiful younger sister becomes a call girl. The forbidden relationship between two pairs of siblings is depicted, with Rin, the accommodating type, and Amane, the rebellious type, delivering outstanding performances. The first half features the younger sister appearing as an active seductress, while the second half unfolds with a forced scenario. Particularly, the performance of Rin Miyazaki in the first half, with an anime-like eroticism, has received high praise. Recommended for those with a fondness for sibling love themes, it offers a taste of the fear and excitement of opening the door to the forbidden.