Ryouta Sakamoto, a lazy NEET in reality, transforms into a formidable player in the explosive online game Btooom! Upon achieving a top global ranking, his triumph is short-lived as he wakes up on a remote island, surrounded by other unwilling participants like the alluring Himiko and businessman Kiyoshi Taira. Trapped in a deadly real-world rendition of Btooom!, Ryouta faces a brutal challenge where the bombs he once controlled virtually now possess lethal consequences. To survive and escape the island, he must confront the grim task of eliminating seven adversaries, navigating a treacherous landscape where every move could mean life or death.