If you're looking for manga similar to Cardfight!! Vanguard: Zoku Koukousei-hen, you might like these titles.
Yuzu Hiiragi and her father run a Dueling school that’s seen better days. If only they had a star teacher to bring in new students! When a rogue Duelist known as Phantom appears in the city, Yuzu may have found a savior, but Phantom will have to deal with the Leo Corporation’s special forces before he can get into any community service!
In the underbelly of society, "Dark Games" are used to settle disputes between opposing organizations of the underworld. Tohru Kageura, a strange boy who possesses a special ability to "see" the Death Deity, is forced to participate in a Dark Game of Buddyfight to pay off his late father’s debt. However, the consequences of losing a Dark Game are a lot more deadly than a normal card fight – one that could cost the player his life!
Humans intermingle with beings from the parallel world of "Shinkinkai." The "Buddyfight" game chooses humans ("Buddyfighters") and partners them with Buddy Monsters from Shinkinkai, and the duo fight against other Buddyfighters. The battles in these games can sometimes even influence the fate of nations. Gaō Mikado is a sixth-year student at the "Aibo Academy" elementary division who longs to be a Buddyfighter and to be partnered with a Monster. One day Gaō notices a young boy being bullied by delinquents, and he helps him out using his Aiki-jujutsu skills. Drum Bunker Dragon, a Monster and the son of the hero of Dragon World, watches Gaō's actions, and decides to form a pact with him as his buddy.
The manga features Kenta Minamii and his goal to become a great player of the Pokémon Trading Card Game. It is especially notable for taking place in the real world, rather than the Pokémon world or the GB Islands.
Yuma Tsukumo is perhaps the worst Duel Monsters player of all time, but that never stopped him from challenging anyone and anything that could shuffle a deck. When a strange dream leads him to unlock an inter-dimensional gateway, Yuma finds himself connected to a mysterious being named Astral who suffers from amnesia. He wasn't the only thing to come through the gate though, for the powerful Numbers cards have been unleashed into the world, each containing a fragment of Astral's memory. With Astral as his guide, Yuma must defeat those who posses the Numbers and reclaim them in battles where defeat means death for his new partner.
It's been many duels since Yugi defeated Maxmilion Pegasus, the super-rich designer of the collectible card game "Duel Monsters." But Yako Tenma, Pegasus' protégé, has never forgiven Yugi for his master's horrible fate. To draw Yugi out, Yako kidnaps Anzu Mazaki and takes her to the heart of the Kaibacorp building, guarded by dozens of the world's most dangerous gamers! But Yako's true plan for Anzu is much worse than mere revenge...