Tatsu Kurozundachi (Baka and test fanfic)

How did this happen? Lazy Tatsu Kurozundachi (Kuro-san for short) has landed himself in the most lowly part in Fumizuki Academy aka the school of summoning. All because he simply dozed off on a test. But Akihisa Yoshii and his friends are in for a surprise when they see his true power.