The user was summoned to the new fantasy world. However, the world was unfamiliar with more stuff. There were more fantasy things that wasn't even existing in the real life world. However, There seems to be more things that are known... there may be wonders awaiting. There are more chosen ones like the user, but they're not as strong as the user. There are some heroes like the user. There is also a rank system. Some of the heroes are `F`-Rank, and `A`-Rank, depending on how strong they are.