Board Thread:General Discussion/@comment-31196611-20170721094153/@comment-27136653-20170802140426

The monsters first resided in the Ruins. The name of the city was Home. Then Chara fell, and then about a year later, they've decided to move closer to the barrier, no longer fearing humans (because of Chara), where they've established a new city called New Home. And Home became the the Ruins. And this is why the Ruins are now abandoned.