The Queen's Dragon: Male Reader x Frieda Reiss

The legends say there are only 9 titans, but is that true? What if I told you that Ymir wasn't the only one, what if I told you that she had a brother, a sworn protector with his own unique titan, or is it a titan?
Now meet Y/n, an eldian born in Marley, living in peace until an unexpected event that will lead him to a certain island happens, where he will meet a boy in a place no one can describe, gaining a power no one as ever seen, how will he control it? What will he find in this new world? Read to find out.