On the Bulletin Board in the Tower after you get through some of the story you will find this side-quest. The aim of it is for you to collect Coffee for Toygar - so it is a simple fetch and scrounge quest.
To complete it you need to scrounge x20 Coffee.
If you have been selling these to get money that will probably be a kick in the gut - but the good news is that this is NOT a rare resource, so getting the 20 you need will just take a little time and effort on your part...
Toygar is standing next to the Bulletin Board - simply approach him and hand in the resources to complete the side-quest and collect your reward and points.