Make your way home. Either way, your parents will caught up with you. Once you're in your room, manage your inventory and store the items you don't need in your storage chest. Sleep in your bed afterward.
Shortly after falling asleep, you'll have to fight some gnomes. This round is easy since they can't do that much damage to you.
You'll have to fight them again the second time but this time you'll be the same size as they are. Don't loosen your guard since all of them can inflict different status ailments. Since you can use an item and attack at the same turn, you must heal up and immediately remove any status ailments, especially Grossed out. After defeating them, the gnomes will run away and another quest will become available.