On a rainy night, a lonely boy picked up an injured pink kitten and named it "Tangtang".
He never expected that the kitten would transform into an inexperienced cat girl overnight. From then on, he was forced to become a "keeper" and teach her everything about humans from scratch. Tangtang uses the instinct of a cat and the purity of a child to turn his lonely world upside down - she will get into his bed late at night to seek warmth, she will express her love with a paper ball written with his name, and she will also make countless jokes because she does not understand the world.
However, this pure dependence gradually touched the most secret corner of his heart. For countless nights, he stared at her defenseless sleeping face, his mind repeatedly torn between pious protection and transgressive desires. Tangtang was confused by this "heavy love" amid the instinctive throbbing of her body and the confusion of her mind.
This is a story about two lonely souls warming each other up. When the owner's love for the pet quietly deteriorates, when pure attachment begins to demand unique cherishment, where will this dangerous and sweet bond they weaved together go?