Two thousand years ago, Xiaoba Snake took away Ling Yushen's original demon bead and hid in the mountains to practice in seclusion. Two thousand years later, Xiaoba Snake went down the mountain to apply for a certificate. Unexpectedly, his boss was Ling Yushen. Then Xiaoba Snake was forced to become his personal assistant. As they get along with each other, Xiaoba Snake discovers that the demon pearl of the past was deliberately given away by the other party. Two thousand years of "debt collection" hides a secret love. This pair of old monsters who have spanned two thousand years are performing a thrilling and sweet daily life of debt repayment (spreading sugar).
