Tsutaeru Toiki Shino became the librarian clerk she aspired to become but she is in a group with Tsuzuki, who gave her a very bad first impression. In the half year to come, she has to endure Tsuzuki’s poisonous tongue and his mean heart. But although she hates him, when she is near him, her heartbeat quickens. One day, Shino kisses him in his sleep…?