Jaryuu Tensei

A man who frequently expresses a desire to win the lottery is reborn as the most powerful evil dragon in a fantasy world. He finds peace living among slimes in a forest, enjoying their admiration. When the evil king's underlings attack and kill the slimes, he is filled with anger and swiftly takes revenge. To prevent further loss, he chooses to leave the forest. This gentle and emotional former office worker embarks on a relaxed journey through this new world.