She is a classmate of Setsuna and she and her two friends (Satou and Mirozawa) regularly pick on Setsuna. However, this only covers up the fact that she has a crush on him (one that she has a hard time even admitting to herself). but will regularly revert to her angry persona when things don't go her way. She lives alone in an apartment (which she bought with her "pocket money", revealing that she is quite wealthy) because she can't stand her parents.
Onihime VS
Weak, bullied and pessimistic about life, that's Setsuna Kashiwagi. On the verge of jumping off a bridge, a mysterious man appears behind him and offers the contract "10 million yen in exchange for your life in a year." Skeptical at first, he accepts. Waking up the next morning, thinking it was an dream, he notices 2 beautiful women sitting beside him, they are Kanna and Rena Kurohime, demon princesses here to claim his heart in a year.
