Maruko to Suugaku Ouji

Momose is a Math genius! He thinks all things can be calculated... It was like this until he met Maruko Ai, a chaotic girl who believes in "love angel" and other things. Maruko has a one-sided love for Momose's childhood friend and now Momose is surrounded by many problems he can't calculate. And the problem is even bigger... Is it love?!