"I want you to give birth to my child in place of my sister." There is no love in marriage, or so she thought. Until she discovered the passionate love of a soldier… Asako is the daughter of a viscount, but she is a dropout in the social world and is treated as a nuisance by her parents. One day, her only precious sister is proposed to by Kido, a soldier who is rumored to be cold-hearted and violent. To stop this, Asako offers to marry in his place, but…!? [A cold-hearted soldier x a lonely young lady] A dazzling Taisho era love story that begins with a marriage! (Original comic: Go wild until you get pregnant - A substitute bride and a passionate love in military uniform)