Kokoro SAKURAZAKA

Kokoro Sakurazaka is a high school student who is in love with her classmate, Yusuke. However, Yusuke is dating another girl and Kokoro is heartbroken. One day, Kokoro meets a mysterious boy named Riku who offers to help her get Yusuke back. Riku tells Kokoro that he can make her dreams come true, but there is a price. Kokoro agrees to Riku's terms and he gives her a magical necklace. The necklace allows Kokoro to control Yusuke's mind and make him do whatever she wants. Kokoro uses the necklace to get Yusuke to break up with his girlfriend and date her instead. However, Kokoro soon realizes that she is losing control of the necklace and it is starting to control her. Kokoro must find a way to break the necklace's hold on her before it's too late.