My Senior Is a Brave Man, but I Am Actually the Devil

"Young man, do you long for the Crystal Palace?" "Want it!" "Then sign a contract with me and become a bartender, Mahou! Oh no, it's the Demon King." "What will happen to me?" "You will be hunted by heroes!" "Get out!!~~" A story about an otaku who becomes a candidate for the Demon King and pretends to be a righteous partner to go on adventures together. (PS: Isn't the brave man a man? How come he turned into a pretty girl! Oh! She's still my senior! A certain otaku was shocked!)