Stupid Devil Dog

Slightly AU story. Saito Hiraga refuses to let people walk all over him. He had plans, he was going to join ROTC, he was going to outrank his brother and sister, he was going to help people. He was smart enough for it, he was strong enough for it, he was determined to be at the top of his future class. But one summoning spell changes everything, and he loses control of his future.