It tells about a love story between a girl called Ji Ze who is suffering due to depression and a boy called Xin Tang who came from another planet with the ability to create illusions with his voice to make people happy.

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.