Fukushuusha Kokona-chan

Kokona Suzuki, 18 years old. Her earnestness in giving everything her all backfires, leading to getting dumped by her boyfriend. Set on revenge, she goes to the tennis club's welcome party for new students, all so she will be "brought back home" and her ex-boyfriend will get what he deserves. This is a story of tennis and revenge by a heartbroken Kokona. (Source: Square Enix, translated)