Zyra's Things

Looking for this MANHWA. PLEASE HELP CUZ I CANT SLEEP UNLESS I RE-READ IT TONIGHT

The plot goes something like. Top is like a sugar daddy, while bottom dont really want that type of relationship. Bottom is built got 'em muscles, taller than the top too. Their first encounter was that bottom is drunk, saying something along the line of needing money or something, i cant remember and then top actually gave him the money. Funny thing is that Bottom actually dragged the top to an ATM machine to withdraw the cassshhhhh.

I remember the bottom's older sister is an author. The top is actually the publisher of the bottom's older sis