The supporting character's harem is very normal - Chapter 503: This Male Lead Is Too MiserableLaleth Garden.

Eric Maddox, a 70-year-old American retired football coach once hailed for his tactical brilliance, now forgotten by time—closes his eyes for what he believes is a normal nap in his quiet Florida retirement home.But when he opens them, he's not staring at ceiling tiles, instead, he's on a touchline.Wearing boots in the rain.With players running on the pitch, fans jeering behind barriers, and the smell of cheap turf pellets in the air.“What the hell is this?”He’s twenty-five again, but it’s not Earth. It’s a world where football reigns supreme. A world where the sport is religion, its practitioners, deities in cleats. Coaches are revered, players are worshipped, and even the kit man gets treated like royalty.But there's one catch: none of it is familiar. The clubs, the players, the leagues, the competitions, and even the currency—they're all different. Alien. Like waking up in a dream where the rules are the same, but the language is foreign.As if that wasn’t enough, the body he’s now in? A youth coach with a laughable win record, a looming divorce, and a measly fifty thousand in the bank that his ex-wife is fighting tooth and nail to take. All of it.Just when the spiral seems inevitable, a monotone chime pierces the noise.[Initiating Golden Finger…][…45%… 75%… 100%][System Integration Complete.][Welcome, host. You are now bound to the Pro Manager System. Objective: Dominate the Football World. A new era begins]From washed-up has-been to chosen one of destiny, Eric Maddox is about to trade arthritis pills for tactical boards, and shuffleboard for Prestigious Cup glory.Because in this world, tactics are power.And on this touchline, he’s about to become a god.

Want to get super vision? Then let’s get some eagle blood.

Want to get super power? Blood of the Bear works great.

Are you going to surpass humans? Exactly, I have vampire blood here.

Do you want to be the ultimate creature? Very well, I have a drop of the blood of the ancient gods here.

…………

Become the headless mayor of the ancient, chaotic city of Arkham, where the gods breed.

Starting from blood therapy, Ross built an extraordinary shelter, a forbidden library, and a museum of the ancient gods.

Ross: We Arkham are full of talented people, and our folk customs are simple, hey! Don’t run! Haven’t visited Arkham Sanatorium yet!

Farming flow, invincible flow, behind-the-scenes black hand flow, Cthulhu.

- Description from novelbuddy

Among the professional strategy warfare gamers on earth, Lin Qian easily emerged as the strongest within the industry. After all, there weren’t many who could defeat a perfect example of a hardcore casher!With a twist of fate, the extravagant gamer left the world in an unfortunate accident. Leaving behind his wealth, he was transmigrated.In this new world, Lin Qian had absolutely nothing he could be proud of. As an alchemist, his brewing pot exploded. As an iron welder, cast-iron turned scrap metals. Not to mention, his dismal talents extended to spiritual arrays and beyond. Besides his slightly above average talent in cultivation, he did not possess anything else that had even a slight semblance to a talent.Yet, life was not all bleak. On one fateful day, he discovered a revolutionary change. The mega-empire which dominated the gaming servers, the very land which he reigned over as emperor, had followed him through his transmigration. Not just so, the invulnerable generals, lieutenants, and the million men army had escaped the realm of mere codes and gained the breath of life.Now, as living beings, they swore their allegiance and lives to him, their Peerless Emperor.

In a morgue filled with the bodies of Uchiha clan members, he opened his eyes...A mysterious voice echoed in his ears...With a bewildered expression, he muttered, “Save the Shinobi world? What does that have to do with me, a mere Uchiha survivor?”