Faith/Fate F/F

A misanthropic young man who has practically no faith in mankind meets the naïve and benevolent Rossweisse who happens to be one of the Saints of humanity.
After managing to save the ignorant Saint from kidnappers, the young man finds himself forced by not only his sense of responsibility; but also the very world to help her.
Facing numerous and powerful foes along the way and with no other choice but forward, he decides to accompany Rossweisse in her so-called pilgrimage and at the same time, teach her the darkness of human society with a cold heart;

"Look here lady, the world is not so nice that little lost you is just gonna-wait...Oi! Rossweisse! Where are you?!"

But it seems like he has to become her chauffeur whether he likes it or not first.