[ Gojou toasts back in a similar fashion, then... stares at the cup instead of taking a drink? It's not that he's trying to examine the drink or anything, it's that suddenly he's struck by good sense. Is it really a good idea to keep drinking? ]

...how's yours?

[ After a longer moment of pondering, he finally takes the down the entire drink in one go. Better to regret after than keep thinking about it. ]