guys do i have to read the other story first if i wanna start this or is it fine as a stan...

It's fine as a standalone

Fine as a standalone (ngl mc from the prequel is insufferable) but you do need to know that the top was second ml and had slept with/had an obsession with prequel mc who is boyfriend of the younger brother of this one’s bottom/mc. Top is super freaky, and wanted to sleep with younger brother too, and that’s referenced in this one