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

Only technically, since at the start of the show he's secretly planning for a divorce

The best fake husband is the one you clash with on everything

Leaders of their rival clubs get over their annoyance pretty quickly once they get to know each other

Enemies to friends, really.  In all relationships.

A bickering bromance til the end

Everyone hates the new Golden Time team, for reasons

Hard to start up a romance when you're trying to fire the lady

Displaced modern lady meets ill-tempered Joseon tyrant

He calls her a poop head, so naturally off to a great start

Selfish people obviously don't get along with each other

A genie who hates humans makes a bet with a human in which one of them is going to die

Sudden demotions tend to put a damper of the relationship

He's just an ornery person being threatened to do a job, so obviously he's not thrilled about the spy sent to be his assistant

Taking on quests to turn angry, annoyed soldiers into allies

These people are aggressively dumb and annoying and he should have never let himself get sucked into their orbit despite what the writers were forcing

More like misunderstandings make them both think the other is a total nutjob