"I want the flame water," says Wei Wuxian at once, "But yes, Lan Zhan can do my hair." It's spoken with a touch of bewildered pleasure - he has no idea why Lan Wangji fixates on his hair again and again, but he likes the feeling of those calloused fingers against his scalp, and he won't complain.

To assist, he yanks at his own topknot, trying to get it undone to free the rest of his long, dark hair.