Ryouta Sakamoto suddenly finds himself transported from playing the hit Btoom! video game to being stranded on a mysterious island, equipped with a day’s worth of provisions, a bag of bombs,and a huge gaping hole in his memory. But it doesn’t take long to figure out what’s going on, especially after the first person Ryouta meets tries to kill him. Fortunately, Ryouta’s an ace Btoom! player, but this insane version of the game has no reset switch or second lives, and there’s only one way off the island: kill seven other people before they can kill you!