In a certain Highschool there is an insignificant loner, Ragami Yuuto. He has such a weak presence that his classmates ignoring him. In the same classroom with him there is a boy called with 'Harem Eroge Protagonist' by his peers. He has personality that of knight, almost all Madonnas fallen for him and he is incredible dense despite experienced lots of 'lucky pervert' events. One day everyone within that classroom summoned into fantasy-themed world as saviors of humanity. Naturally they gained outstanding abilities and stats that higher than normal human except Yuuto who gained the lowest stats with level cap 1 and only one skill without even the most basic skills. What should the 'weakest' without popularity do in middle of arrogant Superman's?