Ren Shiken, a spirited and energetic teen, wakes up to a life-changing day—his departure to the mysterious Phantom Guild. Though young and carefree, Ren carries the legacy of his father and grandfather, legendary fighters who once trained there. As he bids an emotional farewell to his mother and grandmother, his journey toward strength, honor, and destiny begins. With hope in his eyes and determination in his heart, Ren takes flight—unaware of the trials waiting ahead.