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"!

いたいけで小柄な少女リティ。
剣も魔法も才能がないと、英雄パーティから追放された彼女はそれでも最強を夢見て冒険者ギルドの門を叩く。
当然、才能のない彼女には夢の“超級”ランク到達なんて不可能……と思いきや、彼女の本領はその“体力”にあった！
山奥育ちの彼女はありあまるパッションで昼も夜もひたすら修行！
これくらい普通だよ？と宣う彼女はまさに脳筋なのだが、本人にその自覚はなし。
気づけば、剣も槍も斧も一度見ただけでマスターして、ネームドボスさえ瞬殺するほど。
そんなある日、街へ魔物の大群が押し寄せる。
凄腕の冒険者たちが絶望に陥る中、リティだけは何故か歓喜に胸躍らせていて……？
猪突猛進！　花よりバトル！　強くなれるならなんでもします!?
後に“怪物”と評される少女が翔る、無自覚ハイスピード成り上がりファンタジー開幕！