Kuroiwa was born in a temple and is currently a training monk. Because of his temple rules, he cannot interact with girls - and more, he doesn't even know how to do that. Mona, the "queen bee" of the school, insistently tries to make him fall in love with her, but he always ignores her in order to keep up with the rules of his temple.
Kuroiwa Medaka ni Watashi no Kawaii ga Tsuujinai