A poor commoner realized he had been reincarnated on his thirtieth birthday.

Ann, a poor commoner, realizes on her thirtieth birthday that she has been reincarnated. Her troublemaking father becomes the owner of a guidance stone, a mystical stone passed down in the dragon kingdom. Led by the stone, Ann travels to the dragon kingdom, where she meets a beautiful man with black hair waiting for her. The king of the dragon kingdom, who seems like the very embodiment of fantasy, says to her: "That's right, it's fantasy. Marry me." This is a story about Ann, who thought she remembered her past life too late, coming to understand that she remembered it at exactly the right time.