Ring Ring

Ring Ring summary:

3 years ago, a university student named s.h.i.+ori took care of a knight who was strangely transported to j.a.pan.
Although he managed to return to his world, but this time, for some reason it was s.h.i.+ori’s turn to appear in an unfamiliar world.
With no one to rely on, s.h.i.+ori meant to meet with the knight, but in this world, he had become a hero…