Resurgence: Grandpa, I Will Set up a Stall to Sell Divine Pets at the Beginning

I accidentally traveled to Mercury and got the Grandpa System. The system asked me to create a new world and let me think of a good way... Setting up a stall to sell divine pets? A guide? An invasion from the outside world? Hum, I want it all! I'll screw you little red guys. Surprisingly... What are the three evil pets doing at the beginning? Am I actually the bad guy? Ps: The introduction is weak This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.