Not exactly a nanny, more like a bodyguard, or perhaps a Darts Master.
However, Wen Nan didn't say that out loud, only stating, "If anything really happens, please help me, great friend. Once this is over, I promise I'll always stick with you and won't run off anymore."
This promise seemed to have quite an appeal to the other person, and after a moment of silence, the reply came, "I'll help you one last time."
"Got it, darling." Wen Nan swiftly hung up the phone, not giving the other person a chance to change their mind.
...
...
Leaving the Plum Garden, Wen Nan walked straight towards Lover's Hill.
Taking advantage of the empty surroundings, Wen Nan quietly crossed the warning line and navigated through familiar terrain to a hidden thicket.
Stopping by some scattered stones, Wen Nan squatted down to examine them carefully.
That was a small bait intentionally left by Wen Nan when embarking on the first main quest, to find his exclusive refresh point.