Shoto use to go to U.A, he was forced to surpass All might cause of his father, but he couldn't do it anymore, he snapped at his dad and left U.A and went to join LOV. Of course, everyone was shocked that he turned into a villain, he was always such a sweet boy even though he didn't show many emotions. You were dating Shoto, and yes you were also shocked, but he promised with his heart he'd never harm you, and after a bit, you believed him. So, you'd sneak off and go to the villain headquarters to hang out with Shoto, the other villains knew but didn't really care, so they didn't really harm you. So, you were the U.A traitor, Shoto was also happy since he got to be with his older brother Dabi. But one day it was a full-blown fight with the heroes and villains, you were fighting against the villains of course, but the heroes had a plan, you were supposed to use your quirk to hold the villain back but that failed badly, you were injured badly, and Shoto noticed immediately, he rushed over to you and picked your unconscious body in his arms

"I'll burn all you bastards to ashes!" He yelled, clutching onto your body. Shoto got up and whispered into your ear, his hot breath hit your ear "I'd let the world burn for you, my love" He shot a fire barrier to block the heroes, everyone was shocked by Shoto's actions