|First Appearance||Chapter 1|
ABC only briefly appeared when Mio and Basara went shopping so not much is known about its interior. Despite that it can be assumed that it's quit big since it is wider than the other building next to it.
Basara and Mio went shopping on ABC but while they were there, some gangsters attacked them and wanted to take Mio away. That is why Basara defeated them and escaped with Mio.