thinking abt this au where katsuki tries to claim izuku when they r little by biting him. n then they get a bit older and they go through all that miscommunication and angst from canon. but whenever izuku is sad he rubs over the little scars on his neck from when they were little
katsuki being all teasing like “come on, use your words, baby” and “i don’t know what you want from me if you won’t say it” . izuku is just so flustered he can’t form a coherent thought so he’s just stammering and whining ,, he just can’t say such filthy things out loud !!!