Satsuki, a dedicated and caring teacher, has guided all her students to graduation throughout her long teaching career. This year, she was in charge of a group of troublesome students, but thanks to her strict guidance, they all successfully reached graduation once again. As she warmly sent off her students with a bright smile, she found herself alone in the empty classroom, reminiscing about the memories. Suddenly, the classroom door burst open, and the delinquent students approached her. "We wanted to thank you for everything you've done for us..." they said, surrounding her.