Age
14
Origin
Japan
Mikazuki Kiryū is a 14 year old, second-year middle school student. Mikazuki is peppy and outgoing. She is more cheerful compared to the rest of the characters. She is a student one grade lower than Keita and was in the same sports club with him back at his old school.

Kiss x Sis
The story begins with Keita Suminoe, a male third-year junior-high school student studying for his high school entrance exams. He is living in a home with his older twin stepsisters, Ako and Riko, who share no blood relation to him, and they help him prepare for his exams. Even though he initially dislikes himself for it, he begins to become attracted to his two step-sisters, and his two parents encourage him to eventually get married to one of them.