The innocent and kind-hearted Ji Youbin actually lives under the same roof with the irresponsible Min Sung-hyun! ! ! Not only was Cheng Hyun "indiscriminately bombarded" every morning, but what was even more disgusting was that Cheng Hyun also mysteriously brought a soul home...·-·! This jealously handsome soul Li Tian makes You Bin afraid but he doesn't realize that he is "red heart blossoming"! Before she could react, several more "wolves" appeared inexplicably around her: "Crazy Prince" Li Hai, Shanyou who was good at disguise, and innocent and kind-hearted Yasin. Each of them concealed puzzling secrets, and thrilling events came to her one after another... Coveted by the wolves, she eventually became a guardian angel, and who was the "wolf" she wanted to protect?