The supporting character's harem is very normal - Chapter 504: The One Who Died Instead

Hua Rong never expected to find herself in Blackthorn Academy, a notorious school created by the government to reform the most troublesome, undisciplined, and delinquent students. A place where chaos rules, fights break out daily, and the teachers have long given up.But Hua Rong doesn’t belong here. She’s determined to escape and return to her prestigious former school—by playing their game. The only way out? Earn enough points through perfect discipline. No fights. No trouble. No mistakes.Sounds easy, right?Except her new classmates are ruthless, the rules are stacked against her, and one particularly dangerous, devil-may-care boy seems hell-bent on making sure she never gets out. Xu Lingwei, whom she once rejected without a second thought. The boy who now stands at the top of Blackthorn’s unspoken hierarchy— holding a grudge.Under the second moon of fate, is this her second chance to make things right? Or will he be the reason she never escapes?.

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.”

Beings that create and control monsters and demons, beings that build and reign over malicious labyrinths, the chosen individuals to possess an overwhelming Unique Skill… They are the Demon Lords.