A man who excels in science majors is very partial to majors, and liberal arts is his "Achilles heel"; a girl majoring in liberal arts is delicate and sensitive, but mathematics and science give her a headache.
An accidentally exchanged wrong question book became a bond between the two.
He explained complex formulas to her, and she helped him sort out the comprehensive logic of the essay. From the tacit cooperation of each other's "make-up lessons" to the inadvertent eye contact and fingertip touch, young feelings quietly grew.