Cardfight Vanguard [TV]

This anime revolves around a card game. the main character Achi starts out in the first episode having a cardfight against for the first time and from there he meets other players. the other main characters are Kai who is almost unrivaled in his ability, Kamui an elementary school student to has a crush on aichi’s younger sister, Iisaki who works at the cardshop, and many others. Aichi, Kai, Misaki, and Kamui end up join to the nation tournament where they must face off against the antagonist of the show Ren who seems to know exactly how he will win.