Baka to Test to Shoukanjuu Ni!, Inou-Battle wa Nichijou-kei no Naka de Recommendations
When I first heard about Inou Battle, I was told it was like another anime. But watching the characters reminded me more of Baka and Test. Both shows feature a love triangle in which a flat chested, tsundere girl and an air-headed girl with a decent-sized (Inou Battle) or massive (Baka and Test) chest pine over the main character, who acts like an idiot in one and is an idiot in the other. Both shows also feature some form of supernatural combat.