[ Gojou has a suspicion something is up. He does have six eyes after all, and every single one of them sees clearly. But the part of him that has a feeling Nanami is pulling a fast one also recognizes that maybe he's had too much already, so he pushes the suspicions away and says nothing when he takes the drink. ]

What are you helping yourself to?

[ He'll wait to drink until Nanami has something in his hand. ]