First Material for Building a New House

Let's go meet Ronnie in the woods in map.

Ronnie from the forest of map asked me a favor of gathering up materials to build a house for the newborn fairies that are to come down the road. By hunting Horny Mushroom and Curse Eye, I’ll need to collect 30 Horny Mushroom Caps and 30 Curse Eye Tails... I guess I can get most of these from the monsters scattered around map...

I got all the items Ronnie requested, but when do I get rewarded for this? What? How many more times do I have to do this??