Daily bullying has made Kei's life unbearable, yet no one appears to notice his suffering—except for his childhood friend, Akira. Determined to end his life rather than continue enduring the relentless harassment, Kei attempts suicide, and Akira agrees to join him. However, the outcome is not as expected—Kei survives, but Akira disappears without a trace. A year later, the bullying worsens after a video of their suicide attempt surfaces online and begins circulating. Searching for the video leads Kei to Over Bleed, a website focused on underground street fighting. Coincidentally, the site's rising star, Bunen, bears a strange resemblance to Akira. In desperation, Kei decides to enter the world of street fighting, hoping it might lead to a reunion with Akira. But the path toward finding Akira is filled with formidable opponents who will push Kei's strength and resolve to their limits.