Kotone is in love with her adviser, Missy Mishimagi. She tries to get one-on-one training this morning to deepen her bond, but unfortunately her teacher is not a hot-blooded type, so Kotone's plan is in vain. But when she learns that Missy is a former national champion of soft tennis, she is thrilled. And an exchange student from England, Elizabeth aka Eri, joined the soft tennis club. Eri quickly became friends with Asuna and the others, but she was an old acquaintance with Missy and had a close relationship!?