Junior high-schooler Yusuke Yotsuya, who is rational and likes acting alone, suddenly gets transferred to another world-Isekai, where two of his classmates Iu Shindo and Kusue Hakozaki were already transferred. As a third player, he is now forced to challenge the quest with risking his life to return to the originalworld. With being ruthless, Yotsuya makes no concessions to emotions and sometimes uses others as pawns. His mission is to prevent his party getting wiped out by monsters and tough enemies. Can he survive to the end to complete this game !?