How I Became King

this story is about a dictator name king kanji and he's the king of Z-Land, the people of Z-Land are brainwashed from his action as he tries to plan out a way to marry the queen who has three lot the largest lands and kills her to obtain her treasury. The young prince of the queen, raisuke, whoos the main protagonist, finds 3 other strong characters to help him kill, king Kanji before he takes over the other three lands.