Prince of Tennis: My Overworked Brother, Echizen Ryoma

System + face-slapping + tennis + tournaments

After transmigrating as Echizen Ryoma's twin brother, Echizen Ryuki steps right into trouble from the start: the moment he wakes up, his younger brother mocks him in front of everyone. “Your hand shakes just holding a racket, and you dare say you know tennis?” He is about to argue back when the “Get Stronger When Insulted” System suddenly drops into his lap: being belittled earns skill points, and firing back with a sarcastic retort can unlock god-tier techniques!

Nanjiro sneers that he's “worse than useless.” Ryuki replies, “Dad probably wasn't perfect when he was just starting out, either,” and immediately unlocks Ryoma's signature Twist Serve. Ryoma snaps, “You copied my move!” Ryuki answers with the A-rank Drive B he just obtained, bringing the match back to a tie. Nanjiro is so impressed that he drops his nonchalant attitude and praises him: “You're kind of interesting.”

Best of all, Ryuki grins and throws Ryoma's catchphrase back at him: “You're still a long way off.” His little brother flies into a rage and unleashes a torrent of insults. Watching his System points soar, Ryuki secretly beams: this little brother is practically a walking experience pack!

From then on, the Echizen family tennis court becomes Ryuki's “home turf for getting stronger.” Anyone who mocks him is helping him unlock more incredible tennis skills. The once-despised “weakling big brother” stages one comeback after another by getting insulted, charging toward the pinnacle of tennis and showing all of Japan that the Echizen family has more than one genius!