(Y/n) attends U.A., the prestigious school for heroes along with her boyfriend, Shouto Todoroki. Her life seems smooth until a certain ash blond boldly decides to confess his feelings to her and swears to take her away from Shouto. No. Matter. The. Cost.

Four years later, everyone has graduated and have already kick-started on their careers. Katsuki and (Y/n) are still together and seemingly happy with their lives. However, the past is a persistent demon that just can't be easily escaped. And it comes in the form of a forlorn ex-boyfriend with a goal in mind.