Ye Yunxing, the eldest senior sister of Heartless Peak, seems aloof on the outside but is a goofy, chuunibyou mess inside. Then she's hit by a romance-brained System and forced to find a cultivation partner.
Dog Number One, nicknamed Dandan, only gets stronger the more Ye Yunxing beats him. A famous underdog who rose to the top in the cultivation world, he's arrogant beyond belief. He goes from cursing Ye Yunxing to die every day to becoming a total simp who beats anyone who dares say a bad word about his senior sister until they don't recognize their own parents.
Dog Number Two, nicknamed Green Tea, is a gloomy, deranged alchemist reborn with plans to destroy the sect. Ye Yunxing catches him and spends every day training him. He goes from “I'll make you all pay! Die!” to “They're all so rough, unlike me, a delicate alchemist who only knows how to make pills. Senior Sister, you have to protect me~” A green-tea dog through and through.
Dog Number Three, nicknamed Delicate Flower, coughs up blood every three steps. Framed and corrupted into a demon, he's obsessive and cold-hearted. He goes from trusting no one to believing that Senior Sister is the only good person in the world, and becomes an adorable, sweet dog who'd happily wash his hands and cook for her.
Dog Number Four, nicknamed Long Batian, is a junior sister hated by everyone. Shunned by her sect, she's fallen into despair, but follows Senior Sister and gradually finds the will to live again. She becomes a confident pup who declares, “I'm going to let the entire Honghu Continent know that Senior Sister is keeping me!”
As the System breaks down, Ye Yunxing turns her cultivation-partner candidates into rabid dogs, terrifying cultivators across the Honghu Continent.
They tremble in fear, while Senior Sister gazes affectionately at her dogs and thinks, “Which one should I choose to prove my Dao?”
The ethereal master, who diligently keeps the dogs apart every day and urges her disciple to quickly master the Heartless Dao and avoid romance, falls silent for a moment at the sight. Then she delivers a thunderous three-word command: “Back, back, back!”
To my liking, the logic is clear