Casio lives in a world and Cruz lives in another world. They coincidentally died in the same time. After they died they found themselves in another world that they are not familiar with. Actually Cruz and Casio’s soul were reincarnated in each other’s body. After the reincarnation they are trying to understand the situation they are in and trying to figure out how they ended up here. But as life goes on they accepted their situation but they don’t know that there is a huge reason behind their reincarnation that will affect their life.