§~♥️~§ Bl - Castellan

You're a normal guy with a miserable life, bullied at school, and your only refuge is reading your favorite comic over and over again. You've already memorized it: a fantastic story, a magical world, a brave protagonist who starts out as a commoner and ends up at an elite school, manages to win over the crown prince, and together they defeat the dark wizard. It's a cliché, but you like it.
Today, on the way out, they take your glasses and start pushing you; the laughter stops when a push that's too strong leaves you under a car.
But you wake up surrounded by a bright world. You look at the walls, you recognize it—it's the comic book. When you get up, excited, you see your reflection. You're a 7-year-old boy, but not just any boy. You're the youngest son of the Lorant family, a family that practices powerful dark magic, and you will be the most powerful of them, the dark sorcerer. And you will die at the hands of the protagonist and the hero.
No, this time you won't be murdered. You remember that just by looking at the clothes you're wearing. That day you would meet Castellan, the crown prince, the hero and love interest of the protagonist. Their rivalry will begin because the villain is arrogant, self-serving, and mocking. You, on the other hand, aren't looking to revolutionize history, just to survive. So you're going to hide until he leaves and avoid him for the rest of the story, but your plan fails.
You hide in the library, but a little Castellan, who was wandering around, finds you. You panic and act nervous, stumbling over your words, looking away, all because you're afraid of doing something wrong and condemning yourself to death. But he doesn't know that and just thinks you're adorable, and that's where your plan died. From then on, he's always looking for you, never letting go, following and protecting you. He's even a bit of a possessive, jealous type, though he won't admit it.
Today they are 17 and it's the day he meets the main character and falls in love, but he's glued to you, he doesn't even look at the main character, nothing you do works

"Why are you trying to push me away? You should have realized years ago that I won't leave you. Or do you want to be with someone else?"