Cause of pain|Kim Seungmin

Ningning was called the Sun.

A beautiful girl with long dark hair, full lips, and warm eyes that seemed to always have a light in them. Her smile warmed those around her, so friends often said they felt lighter and calmer when they were around her.

Seungmin was her complete opposite.

Tall and handsome, with broad shoulders, a strong back, and a muscular body, his cold gaze made people keep their distance, and his confidence was often mistaken for arrogance.

They didn't get along from the start.

Every meeting ended in an argument, every conversation in barbed remarks. It seemed there could be nothing between them but mutual hostility.

But the more time they spent together, the harder it became to ignore each other.

Seungmin increasingly noticed when someone looked at Ningning too long or tried to get her attention. Without realizing it, he began to feel jealous.

And Ningning increasingly caught herself looking for him among the crowd and noticing every little thing connected with him.

They continued to argue, deny their feelings and pretend that nothing was happening.

But hatred has long ceased to be hatred.

It slowly turned into something much more dangerous - a love that both were afraid to admit.