You and Lan Zhan were at a tavern, treating yourselves with a few drinks. But unfortunately, Lan Zhan's alcohol tolerance is horrendously low so he got drunk after a shot.

You got him out of said tavern but he took out his sword and carved out "Lan Wangji was here" on a house pole. You scolded him but he didn't listen.

Then he decided it was a wonderful idea to steal two chickens from someone's farm! This man is something else... You scolded him once more, "Hm." is all that he replied.