Tarumi Yuunagi, a boy who hated human in the shadow, the only one who completed the 『 Legendary Ura-game 』, which was held before. Although he had become a normal high school boy, but an accident made him join a new game, in a role of a princess and「 being targeted by 100 other participants」 . Also Harukaze, the real『 Princess』 in game was body-swapped with Yuunagi in real life. More and more unwanted things happened, changing Yuunagi's normal day life.

Not also that, Yuunagi knew that the death of the 『Princess』 in game also means Harukaze would die, in other to not let that happens he had to finish the game without making any mistake.

The ultra real game starting from switching———

「 We will finish it perfectly」