Cardfight!! Vanguard G: The Prologue

One day, Chrono Shindou finds a deck of cards in his locker, and goes to sell it at Card Capital 2. However, Kamui Katsuragi challenges him to a fight, and the gears of fate begin to turn.

(Source: Bushiroad, translated)

Cardfight!! Vanguard G: The Prologue was originally serialized without the subtitle in the December 2014 to April 2015 issues of Monthly Bushiroad. A booklet compiling the series was included in the "Disc wo Mamore!! Ban Guard G" mail-order campaign, where the title was renamed to include the subtitle.