Enen had a sweetheart before she was nine years old, but he disappeared after stuffing her with several notes. Enen kept them all the time. There were eleven notes in total. From the first one, "I like you," to the last one, "I hate you," it only took two months. However, it took Enen seven years to forget it, until that day seven years later, he was... The transfer student stood on the podium of their class and introduced himself, and Enen realized how she could have forgotten him... Not knowing how to face it, Enen decided to pretend to have amnesia, but her best friend Su Su hugged her and introduced him that they were childhood sweethearts. Unexpectedly, he smiled and said, "What a coincidence, me too." Enen was instantly petrified...