Takahashi from the Bike Shop, Vol. 3 (manga)

This has nothing to do with you, Ryouhei-kun...Love is in the air as Tomoko and Ryouhei's feelings for each other grow ever deeper. But when Ryouhei witnesses Tomoko's boss sexually harassing her in public, he immediately jumps into action and causes a scene! The resulting commotion stirs up trouble for Tomoko and nearly gets Ryouhei arrested, and now the two just can't seem to see eye to eye. With such a huge rift forming between them...could this spell the end of their relationship?!