"Um... is that all you wanted to say?"

Hanne von Ratzel, a margrave's daughter and student council member of the Royal Magic Academy's Magical Tool Research Department, possesses a talent for "magical tool development"—both her specialty and hobby. In other words, she could be called a magical tool development fanatic. One day, as she was as usual in the student council room devoted to developing a magical tool capable of video recording, she was summoned to the school's entrance on the grounds that a certain suspicion had been cast upon her. Waiting for her there was her fiancé, arm-in-arm with a baroness's daughter. Her fiancé declares to Hanne: "I hereby break off our engagement with you!" What her fiancé did not know was that among the magical tools Hanne had developed, one contained recorded footage of his own infidelity. ――This is a story of a young lady who holds video evidence of her fiancé's infidelity being confronted with an engagement dissolution.