Prince of Tennis: From the Start, I Reincarnate as Echizen Ryoma

System + transmigration + tennis + invincible + multiple heroines + scheming + playing dumb to catch the tiger + big shot + genius

Modern-day overworked 996 employee Kuai Dou transmigrates to another world and binds himself to the Tennis Deification System. He is saddled with the ultimate mission: win championships, charm every beauty, and face-slap all the geniuses. Refusing to follow the rules, he turns down a popular prestigious school and joins Rikkai Dai with the State of Selflessness from the start, only to discover that his nominal younger brother, Lin Yu, is also a transmigrator. Lin Yu is fixated on another school and becomes Kuai Dou’s “walking reward machine”: the weaker Lin Yu gets, the stronger Kuai Dou becomes.

After making a name for himself in the school tournament, Kuai Dou cracks the signature techniques of Rikkai Dai’s powerhouses and allies with the hidden transmigrator Niou Masaharu. Together, they sweep the regional tournament: crushing Higa, outsmarting Jōsei Shōnan, and narrowly defeating Fudomine, all while face-slapping countless geniuses. He establishes an interschool club, invites strong players from every corner to join, receives guidance from the legendary coach Nanjiro, and grasps the ultimate form of dark matter tennis.

He defeats Hyotei in the semifinals and sweeps his formidable opponent 3–0 in the finals. Lin Yu, who turns against him, and the observer working behind the scenes are both defeated in turn, and their downfall brings a cross-dimensional ultimate boss into the open. Kuai Dou gathers his teammates and allies, annihilates the boss with the light of another dimension, and claims the regional championship, only to discover that an even greater dimensional threat is drawing near.

From newcomer to the heart of Rikkai Dai, from lone fighter to team leader, Kuai Dou uses his strength to crush anyone who refuses to submit. He achieves legendary status on the tennis court, wins the affection of many beauties and the friendship of comrades who would risk their lives for him, and prepares for the national tournament as he awaits the next challenge.