Anime about a boy getting chased through a school? This is what I do remember about it:


I saw it either in 2013/2014 on either Anime Network or Funimation Channel.


It was a free preview episode.

I remember the main character was a guy, and he was fighting/running his way through a corridor that I think was part of a school/academy. 


The building was brick or stone I think.

I'm not sure, but he may have been pulled to the school from another world/dimension.
The guy was being chased by different groups of people, and they were all trying to fight him, but I can't remember if they had magic or just weapons.
I'm pretty sure most of the characters were male.
I remember there was a tall, strong man type guy in one group.
The main character runs into a pretty boy type in an outside garden area.
For some reason, all of the characters had to fight each other or had to fight the main character. 
The people chasing the main character were in groups of 3 or 4.  


I don't remember much about the plot, only what I saw.  Any help would be appreciated. ^-^
I think the anime you are looking for is Magical Warfare, the events you described are from the first episode.

The strong man is Takao Oigami



The pretty boy should be Kazumi Ida




  Takeshi Nanase is an ordinary high school boy who has a somewhat dark past. However, one day, he comes across a girl named Mui Aiba, in a uniform he has never seen before, collapsed on the school campus. This encounter changes Takeshi's destiny completely. Mui tells Takeshi that she is a magician, and she apologizes, for she turned Takeshi into a magician, too. What Takeshi once knew as one world is actually two — the world where magicians live and the world where humans live.