meteorgun

Running away from home after living in misery, because of my parents for like 20 years and making a decision that I would live till my body stops, instead of committing suicide even though it's quite a boring world.

definitely Invaders of the Rokujouma!? The main character thinks he got himself a sweet deal of an apartment, but it's apparently haunted by a ghost. The thing is, there are other people who want his apartment also so they keep playing games over the amount of property of the apartment.