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The new Pet Hotel resident, NaiNai the cat, helps a caged woodpecker struggle against its urge to destroy wood; NaiNai, once a homeless alley cat, discovers a full bag of food and eats it all, sparking chaos at the hotel.
Soon after NaiNai decided to stay in the Pet Hotel, things get a little out of hand when a pet snake is delivered for safekeeping; a pet fish is delivered to the Pet Hotel for safe keeping, NaiNai mistakes it for food.
When a spider arrives at the Pet Hotel seeking a new home, NaiNai must care for it, though it only wants hugs while creeping everyone out; a boastful duck checks in, bragging nonstop and annoying all the other animals.
When Sanhua, a mysterious alley cat, sneaks into the Pet Hotel, NaiNai realises she's an old friend from his wild past; a gentle mama hedgehog arrives and the animals discover she's about to have babies.
Robin prepares for a date with his crush Jasmine, while the pets secretly try to help, but only make a mess of things; when a so-called tiny pig named Tiny stays at the hotel, NaiNai and friends quickly learn he's anything but small.
A nervous skunk checks into the Pet Hotel, NaiNai and friends scramble to keep it calm - or risk a stinky spray; an arctic explorer leaves her snow fox and the animals go all out to make the frosty newcomer feel at home.
A chameleon stays at the Pet Hotel while its owner escape-proofs the house, the animals quickly learn why; a parrot joins the hotel and the pets are both amused and troubled by her nonstop voice mimicking.
The pets go to the park, where Robin asks them to stay out of trouble; but when hawk Harry sees BuBu teased, he snatches him to a nest on a tree; a penguin is accidentally sent to the Pet Hotel, it's heartbroken, meant to return to the Antarctic.