Hand over a bundle of licorice.

Summary Ah! Judging by the sweet scent,
this must be Shinhee NPC Knowledge's licorice!
I would love to hire Shinhee to work in our apothecary, but as you can see,
we can barely make ends meet ourselves, so it's not easy!

Quest Text Hmm, brew this and drink it after lunch and dinner, it will work wonders.
There's nothing better to restore your vigor.