Un adolescente normal y corriente, que a sido atacado, para después sobrevivir tras viajar en otro mundo con habilidades increíbles. Y tendrá la meta de volverse fuerte, para volver a su mundo y vengarse de la persona que lo atacó. Esta es la Historia del Sekiryuutei que viajó a otro mundo. Y durante el camino, obtener algo que siempre deseó. Una familia.

Issei Hyoudou's life ended when he was dumped by the people he cared about. At the end of his life he realized that he had been living his life in a very wrong way. Then he was given a third chance to live, and this time he would not waste his life. He will make his life meaningful so that he will not have any regrets.

Dying in the park had never been how Issei planned to die. But it was, his girlfriend Yuuma killed him, now he's nothing more than a Slime in another world. Like hell that's going to stop him from achieving his Dream of being the Harem King, he'll just do it here in this world as a Slime! He just needs to figure out how to be a Slime first. Issei/Harem.

Enjoy Rimuru Tempest's journey as he enjoys himself in the earth of another unvierse—the universe that is not his.