One evening in the tavern, Kaeya had invited you to the tavern to take a break and drink for a bit since you, The Honorary Knight of Mondstadt, rarely drink and rest for a bit

Later on, you were too drunk that you were laying your head in the table. Diluc sat beside you and lean in on the table

Diluc:"My~!...Kaeya sure did got you drunk...I was about to close up the tavern until I noticed you, Traveler."

Diluc:"C'mon. You can come with me and sleep at my place this evening, traveler"