Death March kara Hajimaru Isekai Kyusoukyoku (WN) - Book 16 - 16-2. The Royal Castle's Salon

Liu Duo was a young girl whose grandmother sold her to four brothers with the intent to be a bride. Unwilling, she ran away the following night, only to fall unconscious while trying to get away. Unexpectedly, however, she was reborn with the spirit of a 25 year old woman, also named Liu Duo.

- Description from Novelupdates

Years ago, Earth was indoctrinated into the “System.”Earth was not the only place with the System, however. With the System came the other races, Invaders. The Invaders had one goal, to obtain ownership of this new habitable planet. This created a bloodbath, and for years the war raged.This didn't really have much to do with Derek. Derek was kind of a loner. Yeah, he enjoyed the occasional chat or drink with others, but he never stayed in one place too long or really got to know anybody new.Derek did happen to be rather strong. After the years of fighting monster and Invaders alone, he had become quite adept at surviving. One thing that helped keep him alive was his refusal to get involved with others. He rarely cooperated with teams.One day, Derek broke his rules and decided to lend some help, as the mission didn't seem too hard. He should have stuck to being alone.

They whisper my name in fear. Justin Black. The guy who sits in the back of the class, always in black, always untouchable. The one everyone watches but no one dares to approach.They don’t know me. Not really.Because if they did, they’d stay the hell away.I don’t do friends. I don’t do relationships. I don’t do attachments.But then there’s her.June Matthews—cheer captain, golden girl, a walking distraction. She’s everything I hate… and yet, she’s in my way. Assigned to me. Forced into my space. Testing my patience.She thinks she can handle me.She’s dead wrong.Because I have a secret. A place where I go to release the darkness inside me. Where names don’t exist, where pleasure and pain are one and the same. A world where people fulfill their deepest, most twisted fantasies.June doesn’t belong in my world.But the longer she stays, the more I want to pull her under.And once I do… I’m not sure I’ll ever let her go.

When 18-year-old Kyle Conner arrives at his aunt's for a summer holiday, he expects relaxation and freedom. Instead, his life is forever altered when he crosses paths with Lilith, the demon of lust and second-most powerful entity in the underworld.Forced into a dark pact, Kyle is transformed into a demon and gifted with a mysterious system that promises immense power. But this newfound strength comes with a deadly price: Kyle must hide his true nature and navigate the treacherous world of demons, all while being hunted by Lucifer and other malevolent forces.As Kyle struggles to control his newfound powers and unravel the secrets of the system, he discovers his ultimate goal: to overthrow Lucifer and bring about a new era of peace. But with the forces of darkness closing in, Kyle must confront the darkness within himself and make impossible choices to survive.Will Kyle be able to master his demonic powers, outwit his enemies, and fulfill his destiny? Or will the weight of his newfound responsibilities consume him, dooming humanity to eternal darkness?