hey, im searching a manga with who is in dungeon and he is the soldier of the demon king, and he is reincarnated so he was human before, and there is a team of adventurers who came everyday for trying to defeating him, and at the end the mc say he was a human and after he go out of the dungeon and he go to the house of a girl who is a rich person and after that i forgot. So could you please help me to find the manga, another information, originaly the manga was a novel, so please help. Thanks.