Taking over all the playground equipment,

buying out all the limited goods,

and taking home masses of the takeout-use ginger from gyuudon places... etc.

They appear out of the Abyss. (There's a theory that it's Nippori.) Nippori Station is one of the last major stations in Tokyo before you hit Saitama Prefecture; the area itself (part of Arakawa) borders Saitama.

Then they slip themselves into the lives of this area.

You don't have to tell meow, I already know all that.

Ah. Of course you do. Yeah. I'm sorry.

See, I've apologized - so cheer up and come out already!