If you ask who Park Ji-seon is
A typical scumbag who doesn't like to study and likes to fight, but he falls in love with the school belle Park Xiaomin.
If you ask who Park Xiaomin is again
Arrogant academic tyrant, school belle level character
If you ask Park Xiaomin, why are you with Park Jiseon?
She must respond to you like this
Park Ji-sun is a stupid and stupid person, but she works so hard to go to the same university as me.