[You were in your period.]

He doesn't know sh!TS about periods, so he holes up in his room for a bit searching it. He keeps saying no to cuddling because he is scared of hurting you, but feels bad as he gives you one of his hoodies each time. Once he finally gives in, but he must get a blanket to make you in a burrito first. And be is extra irritable with everyone else at the base to not bother you (and he secretly feels kinda useless in the situation) so Dabi would start joking that he's on.