I marry the MOTHER of Hero/ Got married to Main character's mother

accident got reincarnated in the world of book named "THE FATE IF TWINS AND FIRST PRIESTESS". The story is set place in early stages of action adventure genre.Which is an spinoff book of unpopular gacha MMORPG Game " DUNGEON RAIDERS".

But park jinwoo who got reincarnated as Fourth child of Duke Helstein Named "HUNTER LAWSON HELSTEIN", recovered his memory of his past life at the age of 15, But he is facing a problem as he is standing before his finance during a Family annual ball party,which is non other than Marquis Jaden's Fifth child AARIA ELIZABETH JADEN, who is mother of both hero and villain of the book and lived her life of misery till her death. And Hunter was one of many reasons for her terrible life as he was a minor villain in the backstory.

Now Hunter have to safe both Aaria and himself from not only their terrible family but civil wars in kingdom, invasion of neighboring kingdoms and arrival of demon prince using his knowledge of both the book and the game.