This book is a bound volume of the author's other band series of books. It is mainly used to write some weird plots that have nothing to do with the main plot and that the group of friends want to see.
Don't ask why there is only one book in the band series, if you ask, it hasn't been written yet.
Updated from time to time.
If you are new here and feel interested after reading it, you can move on to read the main text. The first part of the band series is "Complex Band: Let the World Re-krkr".