Seo Ji-hyeok and Park Seong-yeon are known to be at each others’ throats at university, like a spear against a shield. Seong-yeon is tired of Ji-hyeok’s incessant pestering. One day, Seong-yeon drives a drunk Ji-hyeok home and punches Ji-hyeok when he suddenly touches Seong-yeon...

“Why did you hit me, Seong-yeon? ... It’s turning me on.”
What the fuck, are you some kind of crazy asshole?!

Seong-yeon's seemingly impenetrable shield starts to crack.