Class pres x Misunderstood pretty playboy. Playboy plays around because he's tired of people taking him only at face value and has stopped caring, until he meets the class pres who's earnest in everything he does because he's working hard to achieve a good future to support his family. They genuinely fall in love with each other, with the playboy becoming completely smitten first.
Uwasa no Saeki wa Kare to Koi ga Shitai