Adult PC Game: Michibikareshi Mono-tachi no Rakuen ~BEDLAM~ by Black Package Archive

Large building and Potsun is built on the site of the suburbs.
Once upon a time, it was the building of a large medical facility was built away from the beaten track.
The place that is not in active use for some time, running quietly back to life now.
But you know that facilities from being used, it has been kept in a small part of a person.
It's because ...... facility that you do not want to reveal.