The Love's Red Signals

Nae and Shuji were childhood friends, but they haven't seen or talked to each other in years. Shuji takes it personally while Nae is only keeping her distance because every time she sees Shuji, her crush, she gets a nose bleed. So what's Nae suppose to do when her and Shuji get assigned to the same homeroom, moreover they're both elected to be the class representatives?!