Renjiro Kurogane is a boy born without power into a family that values strength above all else. From a young age, he was subjected to constant abuse and bullying, with only his father, Daigo Kurogane, offering him love and support. Despite this, Renjiro held onto a dream of becoming a hero, hoping to attend Japan's top hero school. However, his classmates, including his twin sister Reina and older brother Ryuji, ridicule and torment him, shattering his dreams. When he discovers his mother's affair with the top hero, Jin Kazehaya, and witnesses his father's tragic death, Renjiro is left blind and broken, forced to navigate the world in darkness. His story becomes one of resilience as he embarks on a journey of redemption and self-discovery, aiming to become the White Snow Swordsman, the legendary hero who overcame impossible odds, despite being powerless in a society built on strength. The plot explores themes of betrayal, heartbreak, and the quest for purpose as Renjiro seeks to prove that even the weakest can rise above their circumstances.
The world around Renjiro is filled with characters who challenge his resolve. He finds an unlikely ally in the black-haired girl, Yor, a fan who idolizes him and is eager to fight alongside him on missions. The group he joins is tasked with hunting one of the 12 Dark Moons, a dangerous underling of the Queen of Hell, Lucy. Tensions run high during the mission, especially when Lucy's name is mentioned, but Renjiro's cold disgust for her and his kind-hearted companions offer him a path to healing. The story balances Renjiro's personal journey with thrilling action and emotional growth, all while revealing the true meaning of heroism in a world that seems to only value power.