Why Does The Protagonist Fall For The Monster Girl?

I woke up as the Villainess, but instead of a halo, I got a Scythe. However, my power has attracted the world's most dangerous monsters: A possessive Werewolf, a bloodthirsty Vampire, a Tentacle-wielding Professor, and a Biblically Accurate Angel with a thousand eyes. They think I'm their prey to be tamed, but they forgot one thing: I am Death itself.

When her beloved father is arrested on the eve of her wedding day, poor Valentina Russo's perfect world falls apart. Her savior? The man who walked away ten years ago without even saying goodbye. — The Russos and the Ricci family weren't always enemies. For as long as Valentina could remember, they lived next to each other, in peace and harmony. Valentina had always had a crush on dark, brooding, Nicholas Ricci. But when Nicholas is cast away for being a spoilt brat as well as a bastard son, Valentina is distraught that he didn't even think it worthy enough to tell her goodbye. Now, it's ten years past, and Nicholas is no longer the young, mischievous boy he once was. Back to exact revenge on both the Russo and Ricci family, especially his violent, cunning half-brother Cielo, he's shocked to discover that Valentina is engaged. And to none other than Cielo, his half-brother. He's always saved Valentina from Cielo when they were little. And he wouldn't mind doing it again. Only this time? He'll make her his. Permanently.

A normal girl just as usual working every day. This changed when she met a demon. She made a contract with the demon to help her. She just want to use her demon, but she find that she can't help fall in love with the Demon

In real life, I had been pushed to the brink by an online romance scam. Just when everything fell apart, I awakened something called the Devotion System, and before I could make sense of it, I found myself thrown into a horror game. Among all the players, I was the weakest, barely able to take care of myself. If I wanted to survive, I had only one option—find someone stronger and cling to them, no matter what it took. However, things did not go the way I expected. Every player avoided me like the plague. Not a single one was willing to team up. With nowhere left to turn, I made a desperate decision. I chose a ghost. I treated her as my bound partner and devoted myself completely to her, clinging to her as if my life depended on it. However, as I spent more time with her, I began to realize she was not just something terrifying. She was someone who had been hurt, someone deeply broken. Hence, I stopped pretending. I began to help her sincerely. In the end, we overcame everything together and cleared the game. However, when I returned to the real world, I discovered something I never could have expected. She had followed me back. From that moment on, all I could do was wait for the system to pull me into the next stage.

He died killing the Demon King. He woke up sixty years too early. Now the monster is a young man. And he is running out of reasons to stay away. --- Lysan Dusk was the hero who saved humanity. He killed the Demon King, ended the war, and delivered the world from suffering, and his reward was betrayal. He wakes up in a young student's body in a dormitory room of a magical academy, and the calender shows that the date sixty years before he was born. The world outside hasn't broken yet. The war hasn't happened. Lysan's plan is to keep it that way by staying completely out of it. Fail his combat exams, spend whatever borrowed time he has left, living a quiet life, where nothing requires him to be a hero. The man who will become the Demon King, the most feared monster in history is still young and beautiful, with pale grey eyes that find Lysan across every crowded room like he is the only person worth seeing. Lysan knows what those eyes will become. He has looked into them across battlefields, spent a lifetime seeing them in nightmares. He never expected it to feel like this up close. Roman is everything Lysan was warned about — magnetic, dangerous, impossible to ignore. Everyone except Lysan, refuses to be charmed, refuses to feel anything at all. But now, he is failing spectacularly at them because Roman keeps finding him. Keeps watching him and making Lysan's carefully rebuilt walls feel like paper. Lysan knows the ending. But for the first time in two lifetimes, he is wondering if the ending can change. If the monster can be loved instead of killed. If staying is braver than running.

Anomalies were descending on the world when I got thrown into a horror dungeon. The problem? I was a hopeless romantic. An even bigger problem? The dungeon’s final boss turned out to be more of a lovesick idiot than I was. The moment he saw me, he practically begged to be my personal simp.. Me: Wait… we’re doing that already? The barrage of comments exploded: “Look at him. The mighty final boss is willing to be the third wheel.” “Sorry, sweetie, but our girl already has two anomalies in line. Even if he’s the boss, he still has to take a number.”