After Maxing Out, I Became a Landlord in Another World

Fifty years after transmigrating to another world... The cheat promised by the goddess was nowhere to be found. With nothing but his own effort, Chen Mian trained himself all the way to max level, conquered countless dungeons, and was finally ready to enjoy a peaceful retirement. ...Only for his system to arrive. A modern apartment standing alone in the middle of an uninhabited corner of another world. A rent-collecting system that showed up fifty years late. "Please give those in need a warm place to call home." And, for some reason, it keeps making him set bizarre conditions for prospective tenants. The goddess: "How did his level exceed the maximum cap?! This is bad... really bad! What are we supposed to do now?!" ... "Miss Flora, you can stay in my apartment rent-free—as long as you agree to my conditions." The elven girl tightened her grip on her staff. "...What kind of conditions?"