After being banished from her home country, Nia's new life has begun in the Mech Kingdom of Marvelia. As the land known for its coldness to foreigners, she had not anticipated a warm welcome, but when her first month ends with her home being destroyed in a night attack, she finds the royal family at her doorstep with an unreasonable request: pretend none of it ever happened. With much reluctance, Nia acquiesces and agrees to follow their narrative-only to find herself faced with all of her belongings taken and a bill for repairs for the whole area in her name. In the midst of feeling humiliation the likes of which she has never experienced in this life, Shylrane confides in her the truth of a secret threat to Marvelia which necessitated the development of the mech knights. It is here that Nia sees an opportunity in more ways than one. It's time to take the kid gloves off! If Marvelia wants her to pay, the Merciless Maiden will do just that-and far, far more!