For the Happy Ending of the Young Villain

I possessed the body of the empire's most powerful archmage, 14 years before the original story began.[Protect...]That's all I remember.Since it's a novel that was discontinued, does it mean to protect the ending?A romance novel. Either way, the ending will be a happy ending for the protagonists.The original story is still far off, so let's just stay quietly in the territory.But then I ran into him at the imperial palace.The main villain of the novel, the fourth prince who becomes a tyrant because of his unfortunate childhood.A beastly appearance. A gaunt body with exposed bones.I feel sorry for him, but if I change the narrative of the characters, the information I know might change-.[The child had never tasted warm soup.]Just feeding him is okay, right...?However."Your Highness the Fourth Prince, doesn't it feel good to be clean?""......"[Abuse and neglect were commonplace for the child.]In the middle of the night, the moment I saw the child quietly trembling, as if accustomed to a servant pouring cold water on him, I decided."Your Highness, will you become my disciple?"I'll make sure you have a happy ending too.***"Your Highness, you'll get caught if you keep looking like that, by your guardian.""That's good, Marquis."12 years have passed, and the now adult Fourth Prince remains a disciple of the archmage."Please, I want to be caught."Realizing his audacious feelings for his teacher.**********************The full-fledged webtoon adaptation of author Ro Gaeng's !'Yes, I'll protect the original story. But happiness won't be just for the two main characters!'The overpowered magician Reina and her lovely disciples are coming to you!+