Description : Sana Matsushita, second year as a teacher. She was in charge of her for the first time, and she was busy preparing for classes until late every day. Her janitor, Sugiura, called out with interest when Sana was making materials in an unpopular library as usual. She can't hide her alertness in Sugiura, who doesn't have much good rumors. However, Sugiura appears in her library again for Sana ...