Puzzle & Dragons X

The story is set in modern day Japan following the growth of the protagonist Taiga Akashi, an elementary school kid who wants to be a professional gamer someday.

The fifth season of Future Card Buddyfight .

A normal high school boy Kisaragi Ryuji's peaceful life is turned into an adventure by the return of his second cousin Eriko. Ryuji and Eriko seize a relic box from a black broker. In the box, they find a red dragon girl Rose. In order to protect Rose from the black organization, Ryuji decides to fight using his power as a relic handler.

Arata was just your normal high-schooler, until one day when things started to move. He gets entangled in a phone game called "Dragon Collection." With his only redeeming quality being lucky, what can he do about conquering the World?