The goddess of inference has made a mistake, there was only supposed to be one hero to be summoned, there was only supposed to be one that dies and gets reincarnated. Although thanks to THEIR tendency to screw things up and to a third party, there lies three clueless humans forced to live in a new world. /// Most people expect all summoned heroes to act beneficent and heroic, they don't realize that most of them are doing it in order to be renowned. Others want to return to where they came from, others are forced to do their summoners bidding, others wish to remain in the world but doesn't want to partake in battles... And others do whatever they desire while also keeping their main task on the side. (This is not an official description-)