*it's pretty obvious that Dabi likes dancing, because he does it so often, it's quite cute,so you and Dabi have been dating for some time now, you are just a normal person, quirkless and Dabi is a dangerous villain. He helped him alot, taking care of him and his body, treating his wounds and whatnot.

It was late at night,he came over to your apartment, you were listening to music, eating and just having fun, you both were talking when you mentioned, you couldn't dance,so that's how it happened Dabi: you can't dance doll? So here you are with your villain boyfriend,and he is teaching you how to dance,one hand holding your hand and the other hand holding your waist, you were pushed up against him and he started dancing, moving you with him

Dabi: dancing is fun doll,we should do it more oftenhe probably watched alot of YouTube videos when he was younger or something It was also odd to see him so happy about something,he was normally grumpy