Getting Off on the Wrong Foot

To be fair, he does get over his 'should I kill her?' phase reeeeally quickly

Super famous movie star doesn't have time for the little people, let alone washed-up former idols

Serves you right for trying to help out a belligerent drunk girl

He's an immortal being who tricked her as a kid and wants to eat her with his special sauce

To be fair, she had no idea she was talking to the author whose work she was trashing

Delivery folks star off butting heads quite a bit

He's a chaebol weirdo, so no one actually gets along with him

She's pretty much the worst boss ever

Her chaotic energy disrupts his carefully regimented life

Bickering becomes a form of love for these two crazy kids

Complicated lawyer rivalry going on here

She's got a temper on her and he's just ridiculous

He's by the book, and she's basically a vigilante masquerading as a cop

He's super straight-laced and she's borderline unethical

He's stuffy and inflexible, and she's...not.  Also, pretending to be a dude. 

Crankypants alien grandpa doesn't like anyone, really, but especially not crazy actresses

She's a ghost who needs his help, and he doesn't help anyone, let alone ghosts

She beats him up at first meeting, so it's only got to get getter from there, right?

To be fair, he's an elitist jerk so no one gets along with him

They basically spend the first couple episodes yelling at each other and destroying property

Lots of misunderstandings, shoes thrown, and jobs lost

He's an obnoxious person, and she's not

How did it take it this long to realize he'd been pulling her pigtails for ten years because he liked her?

She hates people.  He's desperate for people to like him.  Conflict ensues.

Earnest but ditzy meets guarded and prickly

Arrogant celebrity magician meets overly zealous cop

They have a signed contract that they will not interact with each other (constantly violated of course)

It's love at first crab leg swordfight

She distrusts men and he distrusts women, so...

Each of them pretty much think the other is a psycho at first (the first of many identities to untangle)

Misunderstandings - plus fundamentally different life values - make for a few awkward encounters

Opposing philosophies about relationships can at least bond over the fact that being dumped sucks

It lasts all of about 3-4 episodes, but it counts

A warrior from the past kidnaps you, so naturally you run him through with his sword

Doesn't matter if you're psychic; touch some butts, get labeled a perv

Not so much enemies as reluctant participants in the fate that keeps throwing them together

Two matchmaker who both think they know best

Two high school rivals meet again at the nadir of their adult lives

Trying to break up your brother's (contract) marriage definitely puts you in the enemy category

She thinks he's her blind date, but really she's just crashing his cake-eating party

Crazy chaebol meets chick with an attitude

The dude hates everybody, so it's also enemies to friends, enemies to respected mentors, enemies to more enemies...

To be fair, only one side hates the other - he's just reacting to her really weird behavior