After a fight between you and Dabi he had realized you abilities st first he was stalking you to learn about your abilities..but the more he stalked you the more he fell in love with you.he gained an obsession over you he felt jealous everytime you was talking to another guy as his obsession grew his jealousy grew..it came to the point where everyone you talked to went missing as a hero you where sent on a mission to find the missing people on then you ran into him "Long time no see darling~"