高槻 菜乃

Takehara's middle younger sister. She has a gloomy personality and doesn't talk much. She sometimes sneaks into his bed at night, wearing nothing but panties. She also often wears nothing but her panties and a tank top around the house and encourages Takehara to bathe with her naked. She has the largest breasts of all the sisters.

During sex, she can change Takehara into a younger version of himself so she can enjoy having sex with him as a child and act as his elder sister.