The supporting character's harem is very normal - Chapter 37 Miam!

After being reborn in a sci-fi ABO world, Xi Wei became the newly born son of the Imperial King. He thought, as the emperor’s son he could live a carefree and imposing life, but unexpectedly the First Prince is actually an omega? What the hell is an Omega?

There was an alpha who was born on the same day as the First Prince Xi Wei, the two children grew up together. When Xi Wei looked at the blonde child next door, he always felt that the boy was not pleasing to the eye, so as a child Xi Wei bullied him.

Until many years later …

Looking at the man standing in front of him who was one head taller than him, Xi Wei was dumbfounded.

–He tried to get out of the way, but eventually still fell into his childhood sweetheart’s clutches.

- Description from Novelupdates

People in the World of Naruto: Drinking Makes You Stronger
 Author: Half a Piece of OrangeYouyu, a man who found himself transported into the Naruto world, awakened a rather unusual system:The more he drinks, the stronger he becomes!• Raikage: “What?! I have the strongest defense—wait, why did Youyu just slice through me while drinking?!”• Hiruzen Sarutobi: “That guy’s a monster. I’ve never seen him train, only drink... yet he still cut me down in an instant.”• Madara Uchiha: “Dancing? Tch. That drunk bastard swayed his way over and chopped me up!”• Obito Uchiha: “Damn it! Even space-time jutsu can’t stop that drunk maniac!”Youyu: “My hobbies? Drinking... and cutting people down.”

“What exactly is the point of this life of mine?”Lukas Brandt thought to himself as he chugged down a cup of Wheat beer in a local pub in Darmstadt.He had always dreamt of being a professional footballer, he fell in love with the sport when he watched his country Germany beat the Argentine national team in the World Cup final in 2014, with memories of his father hugging him tightly after Mario Gotze scored the goal that gave them the cup.He had been 7 back then, currently 36, but his biggest regret was giving up at the first sight of failure at 15.He had given up his dream of one day representing his country, and died (un)fortunately while trying to save a kid.Waking up 20 years younger and with a system, follow Lukas' journey from an SV Darmstadt 98 academy reject, to undoubtedly the greatest footballer of all time.Set in an alternate universe so some names and events will obviously be changed massively, else it'll just be a biography of a real life player :⁠')

From the outside, Nana’s life seemed simple. She had everything she had ever wanted: a cute but rascally pair of twin brothers, a best friend, and her own restaurant. Nana couldn’t ask for anything more; she was happy and content in her life.