Our protagonist get’s summoned to another world with the girl that bullied her a lot in her original world
here he came to know that it was a hero summoning ritual and he thought he was gonna be the hero who will save this world
but in reality the girl who used to bully her became the destined hero and the goddess told him that he just got caught in the ritual,
unable to go back to his original world protagonist decided to follow the girl who used to bully her but his worth here is still no more than
a slave, than he got a power that can give justice to him ,
what will he do will he use the power to take revenge from the girl how bullied him along with the goddess or will he save the world.