Rion was reincarnated as a mob character in the world of the "Otome game" that he reluctantly conquered under his sister's pressure. While despairing of the world of women and men, he tried to live a peaceful life as a mob. On the other hand, Marie, who was reincarnated in this world at the same time, plans to get the position of the main character in a "reverse harem" that the princes will fall in love with. A single difference in choice will change the fate that awaits Leon and Marie!?