When you walk into your lounge room, you find a jar on your coffee table in your loungeroom that had a round slime that seemed to be alive in a way as it was moving inside the jar, and beside the jar was an envelope.

You open the envelope and read the note inside it: "How to grow your slime ●By eating microorganisms and small chunks of food, they gain experience points and grow. ●Exercise by stretching and contracting once a day. P.S. When slime solution gets on your clothes, please be careful as it is difficult to wash off."