This is an automatically translated description

Opening another mysterious parcel, Nemo and his friends find... a slippery green slime! Immediately, the Slime comes to life and grows incredibly fast, and the friends' hometown is hit by a sudden, pelting rainstorm. The only way to stop the disaster is to return Slime to its owner. However, the enterprising boys are in no hurry to save the town from the disaster, as they accidentally discover the amazing cosmetic properties of the slime and hope to make a fortune on it.