I was taking a nap in a tree trunk, but I was suddenly attacked by a giant slime. I tried to save him but almost turned him into an idiot. I wanted to live a good life fighting monsters on the grassland, but I accidentally found the "Moonlight Treasure Box" in my warehouse! Oh my god! Where is this coming from? Since then, he has encountered various pursuits and gathered a group of unreliable partners to embark on an adventure with a strange beginning. Will it really go smoothly? !