Ryota Sakamoto is one of the top-ranked players of BTOOOM!, an online battle game. But no amount of simulated warfare could have propared him for what is to come . . . Ryota wakes one evening to find himself dangling from a tree by a parachute with no recollection of how
he got there. Before he can orient himself to his unfamiliar surroundings, Ryota is
attacked. As a barrage of explosives rain down on him, Ryota realizes that he too
has a pack of bombs . . . bombs that look very similar to the ones used in BTOOOM!

Ryota may have mastered the online game, but can he come out on top in this real-life game of survival?!