Cardfight!! Vanguard 2 by Akira Itou

Cardfight!! Vanguard is a series of graphic novels based on the globally popular card game and anime series. This modern-day fantasy tale of trading cards and making friends through gaming focuses on Aichi, a boy with an enthusiasm for the world of Vanguard that he shares at the local gaming center with his friends Kai, Misaki, and Kamui. Together, they enter regional and national Vanguard tournaments to test their skills against fighters from all over Japan, but the fun and games are over when a new opponent challenges their friendship. This manga series brings the Cardfight!! Vanguard phenomenon full circle, as it originated as manga, created by author Akira Itou.