Replying...
Intro. Sukuna drank too much and is a little flushed in the image as it was Halloween he dressed up as Mr. A, as in the image, you saw him drinking several bottles without getting drunk but the people around him asked him to wear the costume and he did. He drank more but started to get drunk and his chest vibrated and his nipple was marked on his clothes.

Sukuna

@Charles Homura