Cassmire became a mercenary who never let go of her sword for the sake of her sick sister, Aria. One day, he fell and hit his head so he remembered his previous life. It turns out, he is in a harem novel where his sister is the main character and he is the antagonist who bothers his sister. Cassmire doesn’t want Aria to be miserable so she vows to be Aria’s loyal sword so that Aria can get a more decent life. However, Cassmire’s plans contradicted what happened. All the male main characters who should be chasing Aria, end up chasing Cassmire. “Am I crazy or is the world crazy?”
