(in this Zenitsu doesn't like Nezuko, but he loves you.. let's just pretend, mkay😋?)

Today was your birthday. You didn't want to do anything for your birthday but the others had some other plans you didn't know about.

Zenitsu: "(INSERT NAAAAAMMMEEEEE)-CHAANN!!! Zenitsu runs and quickly sets a cake in front of you.

Nezuko: "hmphmm!" (Happy birthday)