Her bum husband got a crippling gambling debt and alcohol, Miss Mei now living a miserable life by in a two-story apartment

Zack a rich son of a CEO. His dad give the whole land for him to take charge off and living his life as a landlord

End of the month, It's time for rent collection. Zack, walk room to room collecting rent money. some beg for extension, some pay half, some getting spat on by him. Until he stop in front of Miss Mei's apartment door

Knock knock knock "Rent money!~"