(Something they don't do with me... I want to see more♪) My beloved boyfriend, my beloved sister. Because I love her so much, I want to see them having sex!! While her younger sister, Ae, is away on a trip abroad, Utana decides to pose as her girlfriend. Her goal is... to have sex with her boyfriend as her sister!? Her boyfriend is usually kind and gentlemanly, but he's only casual and rough with Ae. If the two of them keep arguing like children, they'll surely have some cute sex. I want to see them having sex from a special seat without ruining their relationship... To make this wish come true, she seduces him by dressing up as her sister, but he gets even more intense than she could have imagined...