Rithi is a petite girl with a tender heart. She was expelled from the heroes' party because of her lack of talent with swords and magic, but she still dreams of becoming the strongest and knocks on the door of the Adventurers' Guild. Naturally, with no talent, it seems impossible for her to achieve her dream of reaching the "super rank"......, but her true talent lies in her "physical strength"! She grew up deep in the mountains, and with her abundant passion, she trains day and night! This is normal, right? She is a true "muscle-brain," but she is unaware of it. She has mastered the sword, spear, and axe after just one look, and can even kill a named boss in the blink of an eye. Then one day, a horde of demons invades the town. While the best adventurers fall into despair, only Rithi, for some reason, is elated with joy. ......? Rush!　Battle is more important than flowers!　I'll do anything if it makes me stronger! A fantasy of unaware, high-speed success begins with a girl who will later be described as a "monster"!