In the magical world of Arch, there lives a woman with extraordinary powers whom they call the Valiant one. She's Rose Hawthorn, an S rank Adventurer working at Alicorn Adventuring guild. She leads a party of three individuals. She uses steel, claw-like weapons to tear her enemies apart. She's young and 17 and lives at the town of Alicorn, in the Kingdom of Erst. She has a unique personality. She's quite strict and bossy. She keeps a secret regarding her dark past...