|Kotosaka Miu琴坂 美雨|
|Hair||, Brown, Long, Twin Tails|
|Role||, High School Student, Step Sister|
|Engages in (Sexual)|
|Visual novels||Main character - Yin-Yang! X-Change Alternative|
|Voiced by||Hokuto Minami|
Age 18. Kaoru's stepsister, the daughter of Kaoru's stepfather. Her last name is different from Kaoru's because Kaoru decided to keep his old last name in honor of his deceased father. She's secretly in love with Kaoru.