After encountering Harry he will plant seeds and grow crops to share with you. You can buy seeds from Dominique in the shop nearby. Buy as many RICE SEEDS as you can and have Harry plant one. Now leave through the door to your right. Enter and exit Harry's screen 5 times (you'll see the rice grow a bit each time you enter.) The rice stalk will be yellowish on top when it's done. Talk to him and he'll give you 10 Rice. Dominique sells RICE SEEDS for 100 each, but she'll buy the 10 Rice for 160. Be forewarned, however, that you can only carry 99 Rice at a time. So be sure to sell them before harvesting more or you'll just lose them.