The Villainous Blond and His Chaotic Otherworld

(Multiple female leads) (No System) (Distinctive Western fantasy) After dying, Leidelian, a yellow-haired villain and an international student, discovered that he had transmigrated back to his old home in a book. Only, his old home was a bit of a mess. For instance, he found cultivation jade slips and things like that in a bookstore. He found guns in a dungeon. Leidelian: “Come to think of it, why is my otherworldly old home such a mess?” And it's dangerous, too. Leidelian: “That's not important. Let me see, a man from a romance novel? Watch me mess with him.” Enya: “Why did Claire apologize to me?” The little princess is attacked? Leidelian: “Don't worry. Watch me use Soulslike tactics to take on an opponent above my level.” “Kids, this is bad. The other side has AoE damage.” Years later, facing the chaotic love triangle, the yellow-haired man said, “I... I just couldn't bear to see you suffer. Don't get the wrong idea, I'm still a villain and a war criminal.” I haven't even turned over a new leaf! This damn love triangle, it must be that evil god's fault. The God of Love: “Humans, this is such a good ship.” The yellow-haired man sensed trouble. No, I can't let a yandere show up!