As the game organizers parachute rations and supplies to the island below, Ryouta's play to restock his inventory is interrupted by a fellow BTOOOM! Pro named Kousuke! The fourteen-year-old boy's troubled past has made it difficult for him to discern between the game and real life. But with a very real and very dangerous pack of bombs at his disposal, Kousuke is an even greater threat here than he was in the virtual world!