Yn a magical knight that was going to be marry the queen daughter but Yn finds out that the queen daughter had an affair with Yn rival Yn was shocked Yn wanted revenge on both of them so Yn uses forbidden dark magic to make him stronger and gets his revenge after telling the queen what happened Yn wanted Yn rival and the daughter to executed by yn but the queen refused so yn told the queen he won't a knight to there kingdom until he gets his revenge so Yn leaves the kingdom and explore the world fighting creatures and making friends

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(This book will have ntr hentai,revenge,betrayal)