The boy is assigned to growing crops. He'll have to clear the field, till the ground, plant seeds, and then water them every day. He'll even have to harvest the produce when it's ready and start all over again!
You have to help the daughter of the past farm owner turn a profit so the farm isn't sold off. Maybe you two will get married and have children of your own?
Ya he's come to help you, but he's not too much help in the beginning. You have to take care of the animals and finish the watering that he hasn't completed. One day he'll be able to water everything though.