Oneday,Theodorefoundagameapplicationthatinstalleditselfonhiscellphone.AgamecalledIsekaiGuide.Inthegame,itisstatedthatthemaincharacterisawomanwhotransmigratedfromearthtoanotherworldnamedEtheria.Thodore'staskinthegameistoguidethemaincharacter,Rosalina,tokilltheDemonKing.SothatRosalinacanreturntoheroriginalworld.But...Theodoredidn'tknow,thatthecharactersinthegamemightnotbejustgamecharactersornpc.AndRosalina,mightreallybeavictimofhisworldtrappedinEtheria.IfTheodoreknewthis,whatwouldhedo?