I transmigrated into the world of the Fourth Holy Grail War and became Matou Kariya.
My own abilities may be a little lacking, but my Heroic Spirit is the Great Sage, Equal of Heaven!
It's perfectly normal for the Great Sage, Equal of Heaven's Master to be weak.
After all, his former master, Tang Sanzang, was weak too, yet he still protected him all the way across eighty-one thousand li.
Let the Great Sage, Equal of Heaven handle the Holy Grail War. I, Matou Kariya, just need to focus on raising little girls.
This is a story about raising little Sakura into a young lady. Oh, and there's Rin and Illya, too, and while I'm at it, I'll raise a very big-eating Saber...
(P.S. The book may be short, but the story is complete, so feel free to read it.)