College student Xu Nian, after touching a mysterious ancient book in the library, accidentally turns into an orange cat and acquires a special task system. To restore normal life, he constantly completes tasks on campus, thereby getting to know classmates like Su Wan, gradually becoming everyone's favorite campus cute pet. As Su Wan discovers his true identity, the two jointly search for five transformation shards to crack the secrets left by the ancient book. Ultimately, Xu Nian does not simply choose between human and cat identities, but gains the ability to freely switch between the two forms, and also confirms his mutual companionship with Su Wan.