MTL - Human Shackles - Chapter 47 Smelt

A dancer who was killed by a serial murderer found himself occupying the body and taking on the life of Brian Morse, a patient with anti-social personality disorder. As Brian, he has the look, he has the brain, he has the charisma, but he also has something that somehow always attracts psychopaths…[The story mentions 3 reality shows and crossovers with the American drama series Dexter. SLASH]

- Description from Novelupdates

After dying in an oddly anticlimactic vending machine accident, Kazuki Ren is reincarnated in the demon realm—not as a hero, not as a villain, but as the only human male student enrolled at the mysterious Academy of Ruin, a school where all the professors are demon lords and all the students are powerful, beautiful she-demons.Ren is told he has one task: survive.But there’s a catch. The Academy’s darkest secret is about to awaken, and Ren holds a hidden power that could either destroy the demon world... or rule it.Now surrounded by seductive demons with hidden motives, eldritch tomes, forbidden dungeons, and twisted exams, Ren must master his ability—or be consumed.Magic, mystery, danger, and temptation await in this dark academia harem fantasy.

Invincible fists, unrivaled hammers!

Suppose you were born stronger than anyone. There are many protagonists in this story. They are considered a geniuses, but you are more talented and genius than them. And you never hide that everyone knows you are a genius.Our MC Jin was born in a powerful clan. He has everything. Before his birth, he activated the all-arounder system. A system that allows him to learn anything from any anime. Later, you will see that he uses Gojo Infiniy, Naruto Rasengan, Bankai, and many other things.