Tsukasa Kasuga

Tsukasa is a second-year student and one of Sayuri's closest friends who hangs out with her and Mina constantly. Being a fate-believer, she ran into Riku one day and started their relationship on the spot, careless to Riku's decision and feelings. Much like Sayuri, she also has several of male admirers at the school who like to cheer for her when she is playing volleyball.