Love Letter From The Future

Academy, Adapted to Manhwa, Aggressive Characters, Award-winning Work, Beautiful Female Lead, Childhood Friends, Dense Protagonist, Enemies Become Lovers, Engagement, Fantasy World, First-time Interc**rse, Friends Become Enemies, Handsome Male Lead, Incest, Love Interest Falls in Love First, Love Rivals, Male Protagonist, Masochistic Characters, Monsters, Multiple POV, Polygamy, Possession, R-18, Royalty, Ruthless Protagonist, Stockholm Syndrome, Strong Love Interests, Sword And Magic, Weak to Strong, Yandere