[Seeing how her stone cracks, and she softens around Katsuki gets a small smile from the blonde. Feeling victorious in his attempt to get the little girl to feel safe around him.]

It's a holiday. It's a day where you're s'posed to appreciate your dad and grandpa and stuff.

[Katsuki never really celebrated father's day OR mother's day, though... his parents didn't connect with him very easily, so he never really felt like he should bother. His mom probably would find a reason to complain about whatever it is he ended up doing for her.]

There's a day for moms too, but I'm pretty sure it passed already.