Kaeya was hanging around at Diluc's Winery, as usual. He was kinda alone in his table sulking because Diluc took his wine, and now he's only drinking a glass of the wine he had left before Diluc took the whole bottle.

As soon as you arrived, Diluc whispered at you to help out Kaeya to cheer him up, he couldn't do it because he dosen't wanna reveal his vulnerable side around Kaeya ever since they were kids. And so I got back his bottle of wine and sat beside him