Strongest Sage with the Weakest Crest 20

In this manga adaptation of the popular light novel series, one boy will stop at nothing to be the world's strongest...not even accepting a domain!Despite having previously refused a noble title and land, Matthias eventually relents when the king of Eis gives him an attractive offer. As the new lord of Boseil, Matty is inundated with political marriage proposals! To escape troublesome political affairs, Matty and his friends head out to explore the dungeon near Boseil, but it seems the real trouble is in the dungeon!