I can't think of the anime name but the first episode stars the main character and either his little sister or female childhood friend. The main character can't help but notice that the sun is different (I think he noticed that the sun was black instead of orange or yellow). Then, I think, he is transported, or something similar to transported, to another world or dimension that's the same as earth but with magic. He then decides to enroll in a magic school because of a girl that may or may not have saved him.
I do remember that it is a recently dubbed or at least somewhat recently dubbed anime.
I only saw the first episode and would like to finish it but I can't remember the name.