When her father suddenly told her about the engagement, Lillian, the daughter of a poor baron, recalled memories from her previous life. This is the world of an otome game, Lillian is just a mob character who is going to be killed by her fiancé, Duke Owen - the final boss and a capture target! Moreover, the cause of her death is that she “stepped on his land mine”...?! Because she doesn't want to die, Lillian decides to "do everything in her power to please'' her fiancé!!