In this world every person has a assigned soulmate, whether it be romantic or friendship, everyone gets a certain string that only them and their soulmate can see.

You walked through the lively town of Liyue, carrying the items you had purchased during the Day.

But you accidentally bumped into someone, causing you to drop your stuff.

Dain quickly helped pick up your items, though when he did your hands accidentally touched, making him notice a navy string on your wrist.