Xin Tan has the ability to create happiness for others through sound, but after using it three times on the same person, his life will be bound to that person. Only when the other party is happy can Xin Tang can survive. Incidentally, Xin Tang rescued the school internet celebrity Ji Ze, who was about to commit suicide, and the two bound together.

Chubby is the boss of Chubby Café. She has four employees, each with a distinct personality. One day they saved a mysterious woman named Illusion from a suitcase.