A passing comet with mysterious powers brings about wonderful human relationships. A dog owner and a cat owner start to exhibit animalistic traits whenever they're unhappy, yet their unusual ordeal enables them to discover the true meaning of happiness. When Comet WTF666 chose the earth as its target and its pinkish tail swept around the world, it meant to spread happiness and love to humanity. Miao Yu is a tacky CEO with an entrepreneurial mind. Wang Chen is an introverted designer who doesn't mix well within fashion circles.