Lin Yun, a college student, is emotionally frustrated and has trouble finding a job. When he returns home, he discovers that his father has remarried and that he has a wealthy stepmother and four stunning sisters. He also unexpectedly awakens to the "Invincible Sweet Pet Raising System." His stepmother wants to train him to inherit the family business. The four sisters each have their own characteristics, whether they are gentle or quirky, and they dote on him. Lin Yun uses the system to unlock multiple skills, while dealing with family turmoil and shopping mall games, and starts a counterattack life as a sweet pet of a wealthy family.
