Maruko to Suugaku Ouji

Momose is a Math genius! He thinks all things can be calculated… That was until he met Maruko Ai, a chaotic girl who believes in 'love angels' and other such 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 his biggest problem of all… Is it love?!