In the first episode of All About My Romance, Kim Soo Young(played by Shin Ha Gyun) got hit on the head by a fire extinguisher by Noh Min Young(played by Lee Min Jung) on their first encounter.
Soo Young was a member of a ruling party, while Min Young was a member of a progressive party. As the ruling party and the opposition parties had a conflict about bringing in a new press law, the ruling party tried to use Soo Young as a bait to pass it through. Min Young who was against it, grabbed a fire extinguisher to hit the closed door.
Just when she swung the fire extinguisher, Soo Young opened the door and got hit on the head. He lost his consciousness and was taken to the hospital right away.
When he woke up, he got mad and called Min Young as the axis of evil, and he also pretended to be seriously injured to make her feel bad. Min Young visited him to apologize, but saw him with absolutely no physical defects, and raged at him.
Source : Koreandrama