Baka to test (baka and test - summon the beast)

At Fumizuki Academy, students use summoned beings to do battle against their classmates. While Class A is the best, the kids in lowly Class F are the worst on campus - and they're about to find themselves facing the school's top talent!

main characters

 * akihisa yoshii
 * mizuki himeji
 * minami shimada
 * yuji sakamoto
 * hideyoshi kinoshita
 * kota tsuchiya
 * ryo sugawa

official site
bakatest.com