The classic example of a younger man

Sehun is a younger man. Jiyoon thinks of younger men as her cousins, nothing more or less, so she doesn't see them as men. However, Sehun likes older women and likes Jiyoon's face, so he follows her around. And Sehun's courtship continues regardless of the time and weather. Are the two destined or is it a painful love that can never come true?