Kiku Murakami

She is a popular girl from another class that the main characters meet on a group date. She likes to tease guys and use them for her own entertainment. After seeing how popular and innocent Yuu is, she makes her goal to sully Yuu’s reputation and make her life miserable. While she pretends to be Yuu’s friend, she takes scandalous pictures of herself dressed up like Yuu and sends them to their classmates. After hoax was revealed, she then tries to seduce Mugi because she viewed him as Yuu’s strength[4]. She returns later on through a chance encounter with Mugi. She no longer acts innocent, but is still popular with guys. It is insinuated that she now has genuine feelings for Mugi even though she knows that he like Yuu. She believes that a relationship between Mugi and Yuu will not last over 3 years because they are too similar and it would not be equal partnership. (Wikipedia)