It's- It's nothing special.

[Izuku pretends to give a small shrug and then he pulls out a few bottles of nail polish that he had been holding behind his back.]

I was wondering if you would like to paint ... each other's nails? [He quickly adds,] It's alright if you don't want to! I was only thinking that it might be fun to do. I've seen a lot of other boys wearing nail polish around Eltrut and it seems like it's part of the fashion here. Maybe it has something to do with pirates... But I ... I was thinking it might look good on you.

[It'll totally look good on Katsuki.]