Hoshi Shiori♀

Shiori is Yuusaku’s childhood friend and the other heroine of this game. She has long held affection towards Yuusaku, but until Larfa showed up, she held back her feelings and continued to be just friends. When Larfa appears, Shiori finally becomes honest with herself and starts her fierce attack on Yuusaku. She is usually quiet and subdued, but she gets very jealous when it comes to Yuusaku. With her mind now set, she starts taking bold actions she never would have before. She used to be a member of the tennis club, but she resigned from it. She also has a complex about her under-developed body.

[From mangagamer.com]