My Multisystem In Isekai - Chapter 57 Blood Blade

From a caste based high school, bottom-tier Naomi Masatsugu is caught up in a summon of his class to a different world. However, as soon as they arrived the king said, “This guy is unnecessary because he only has clumsy skills ” and it is concluded that he is to be forced to administer the orphanage, which no one wants to do. Unfortunately for the orphanage his skills were cheat skills that cause the girls to cling to him.

In order to “defend” the girls that depend on him, he must operate the orphanage while overcoming the powerful people, authorities, and former classmates that surround him.

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

A Time Loop Thriller Without Time Travel. No Superpowers. Just Mastery.Eron Vale wakes up at 7:00 AM every single day—the same day. For the world, time moves forward. For him, it's been over 100,000 loops of the exact same 24 hours.No powers. No resets for the world. Only him.He’s died. He’s starved. He’s gone insane—and come back sharper each time. But now, after centuries of learning every face, flaw, and secret in the city, he’s done watching.Eron begins executing his final plan: to infiltrate and take control of the most powerful secret organization in the world—Helix—using nothing but perfect timing, manipulation, and skill.Every conversation is a test he’s passed thousands of times. Every ally is a pawn he’s moved before. Every threat? Already defeated in another try.But this time, it has to be perfect.Because he’s done reliving this day.And for the first time in 100,000 tries…He’s making his move.

The boy who Sneaks in My Bedroom Window