poor bunny, he's just trying to do his job, sure it seems horrible to the humans as they die, but odds are something this huge with constant parties passing through...or passing away...is probably more than just someone's entertainment, my guess is it's gonna actually be that this place bleeds off the power of some evil god as monsters to keep it weakened and uses the power of the souls lost to keep said weakened being sealed away
...of course our MC is probably gonna build up enough power through abusing the system to finally put an end to it all