Unmagical Twins

Lan and Ran are twins that were supposedly born in a family of well known mages though they are not sure about that since they forgot their parents and the fact that they were the only ones that does not know how to use magic in the whole kingdom.They had been taken care of by a family who had a boy around their age.The twins lived happily with them.
One day, the family decided that they should sent their child and the twins to a strange place called Earth where there people were like the twins,they were unmagical.