What BL is this

The MC runs away? His home town or the city and starts a job at a school sort of short notice. I think this may be ABO? Well something happens, maybe he gets sick or has a heat? And the landlords son comes to his apartment to make sure he's ok but doesn't answer so he checks up on him idk maybe they fuck then or a couple chapters later...the sons landlord is also a teacher? At the school he works at.