How about:
It was the last day of summer and Ollie’s mom wanted him to come do after school shopping with her, and Ollie notices a strange bright red backpack at the store, and decides to buy it.
Later, at night, CW came out of the pack and woke up Ollie, and Ollie was shocked to find the strange, cat-like creature. He was about to call out to the rest of his family for help, when CW interrupted him by said he didn’t mean any harm.
Ollie refrained from called his parents (and the police for that matter) and listened what the small cat creature had to say. CW introduced himself and told Ollie he was meant to be the chosen one and his backpack had magic powers.
Ollie hardly believed him, though CW showed him the backpack, the gateway to the monsterverse to prove he was telling the truth. “This backpack here is the only portal to the monsterverse, an alternate universe filled with all sorts of monsters, and the chosen one is supposed to protect the universe from monsters such as the ones in the pack. Though with great power, comes great responsibility, which is why you must protect the pack from anyone who tries to take it,” CW explained.
“Hold up,” Ollie shouted in a whispery voice, ”You mean that a bunch of monsters are in that pack?”
Ollie whispered a bit too loudly and woke up his sister, Pyper. Pyper tracked the sound to Ollie’s room and started walking down there.
“ Hold on,” Ollie whispered. He suddenly heard the sound of Pyper’s footsteps and was in a panic. “I hear someone coming!” Ollie said to CW, urging him to hide somewhere in Ollie’s room. He hid in the closet, while Ollie quickly jumped into the bed, covering himself in blankets. Pyper creaked the door open, and peaked out, making sure no one except Ollie was there. She slowly creaked the door back, suspicious of her older brother.
(I’m gonna make more later, because it’s almost midnight, and I’m sleepy)