Who would understand! Transmigrated into the world of Prince of Tennis, the orphan Rinji Kanzaki not only has money and an apartment, but also carries the lingering soul of a DNF Elementalist! He knows that Seigaku has Tezuka, Hyotei has Atobe, and Rikkai has that "Child of God" Yukimura—but that doesn't stop him from secretly rolling around since elementary school: old YONEX rackets wrapped in black straps, bandages hidden in his cuffs for extra practice, and obsidian earrings that represent his obsession with "adulthood".

Once he entered Rikkai, he transformed from a "Gray Feather Falcon" into a "Silver Tyrant": 175cm tall with shoulders as broad as Sanada's, his team uniform open, revealing an old scar on his collarbone, he tossed a coin from another world before matches to determine his serve, and his wristbands embroidered with "King's Gambit" were a blatant provocation. While others played with spin, he played with elements: lightning-enhanced defenses, ice walls locking down half the court, and with a single placement of a void ball, all the opponent's balls were sucked away to the landing point he desired!

Nan Ji, a seemingly ordinary sixth-grader, was an avid Fate/Grand Order player in his original world. He was obsessed with the game's Heroic Summoning and historical adventures, and particularly with the mythical hero Gilgamesh, for whom he held a near-worshipful devotion. However, by chance, while summoning another Heroic Summoning late at night, a dazzling light enveloped him...