Anata no Imouto

Yuuka has finally begun dating Kouta, the childhood friend she has secretly admired for years. Two months into their new relationship, the couple decides to take a significant step by visiting his home to be intimate for the first time. However, due to their mutual inexperience, the encounter proves awkward and unsuccessful, leaving Yuuka deeply distressed and uncertain about how to move forward. In her moment of vulnerability, Kouta’s younger sister unexpectedly approaches her with an unusual proposition, asking Yuuka to become her ideal girl. This startling request draws Yuuka into a complicated dynamic that extends far beyond her romance with Kouta. What begins as a simple relationship between two inexperienced lovers quickly transforms into an entangled situation involving the boyfriend, the girlfriend, and his younger sister. The resulting love triangle is intensely sensual and impossible to look away from, yet so morally transgressive that readers may find themselves wishing they could.