A loser salaryman who had a habit of "I wish I could win the lottery..." reincarnates as the strongest evil dragon in another world. He was content living a peaceful life with the slimes that looked up to him. However, one day, the Demon Lord's followers suddenly attacked. And they slaughtered the slimes that were there. Enraged, he quickly exacts his revenge, but to avoid any further casualties, he decides to leave the forest. The carefree adventure-fantasy of a former loser salaryman, current Evil Dragon who is kind to the weak and easily moved to tears, begins!