Even though Kaeya seems like a fun guy, he is often lonely. He doesn't have anyone (or rather, no one) to talk to, and he spends his evenings in some bar.

What a coincidenceee,you saw him at a bar and sat next to him(You're his friend)You drank your drinks without talking. When you were about to stand up, he grabbed your wrist.

"If you're not busy..Don't go now..please"