Top-Grade Retainer

Top-Grade Retainer summary:

A young sales manager, due to an accidental experience, arrives at a completely different world. In the Xiao family’s mansion, he becomes a glorious . . . retainer!
Late comes the dawn of spring,
The myriad flowers foresee its arrival.
Planting peach trees year after year,
They bloom at heartbreak.
. . . . . . . . . . . . . . . . . . . . . .
Poem of the Peach Tree — Third Bro