I know this is really similar to the last one but I'm a whore for hurt/comfort.

Also we also Stan non toxic iwaoi in this household

Iwaizumi one day is waiting for Oikawa outside his house and ends up going in with his spare key to find a crying Oikawa. Oikawa tries to play it off but then spins that he feels worthless. So then Iwaizumi just says everything he loves about Oikawa and he's still crying but they're tears of joy now.