My nickname is "Sleeping Beauty."

Emma, who has possessed the nature of falling asleep anywhere since birth, has earned the nickname "Sleepy Princess." Being as she is, when she sees her fiancé, the Second Prince, having a pleasant time with the baron's daughter who has recently become a hot topic, she thinks nothing of it. While yawning, she vaguely and leisurely thinks, "I wonder if this relationship will end soon too." Then, at the academy's graduation party, an engagement cancellation scandal breaks out. She assumes that she too will be told by her fiancé that the engagement is canceled, but as she listens to what her fiancé has to say, things unfold in a way that's somehow different from her expectations...?