Sister x Brother's best friend
Two students who hate each other
Teacher x Student (if you're the teacher and you have a really interesting plot in mind)
Rich guy x Poor girl
Master x Slave (you're the master)
Girl x Brother's best friend

Princess x Servant/Guard
Prince x Servant/Guard
Prince x Spy/Asassin
Princess x Spy/Asassin
Princess and Prince from enemy kingdoms

She's been in the Mafia as long as she's lived. She was born into it. So she's used to staying out the police's clutches. They don't even know exactly what she looks likes. Every time they think they have the upper hand, she's been 5 steps ahead. She enjoys toying with them way too much. The police chief's son is getting annoyed by how much his dad is having so much trouble. His dad likes to focus more on catching her than paying attention or giving a second thought to his son. The son has made it his goal to find this mafia girl and bring her in. But he's not telling anyone. And when he finally is able to find her and interrupt one of her jobs, he finally sees what she looks like as her mask falls off in her rush to leave. He decides not to tell anyone what she looks like either, too wrapped up in finding her again. She easily catches on to what he's attempting, so she's made him her new play thing. From that point on, she messes with him- flirting, fighting, teasing- playing with his mind. She never thought she'd end up falling for him. Ditto for him. Neither can admit they've fallen for each other, and the boy is conflicted with his father's frustration and his original goal to bring her in, and to love her.

He was the biggest player in school. He had seduced almost every girl in school. His reputation spread slowly. Somehow, he was able to slow the gossip (probably by sleeping with all the gossipy girls at the same time to keep them from spilling). But then the secret was seeping out slowly. Suddenly, a new girl arrives. He thinks he can take advantage of her not knowing any rumors from school. She's definitely gonna be hard though, but that just makes him more determined. She's not very social and she's definitely not a girly girl who's so easily seduced. He likes the challenge though. He never expected he'd eventually fall for her. Not that he'd admit it. Ditto for her. After they fall for each other, she finds out about his past, but she doesn't run. She loves him and she knows he changed. But then a couple of girls hold grudges against him and decide to ruin their relationship. They convince her that he went back to his old ways and slept with other girls while he's dating her.

Zombie apocalypse, nuclear war apocalypse, pandemic. You may choose. But our characters have a history together. Two years into the disasters, our characters met up and it took months for them to trust each other. (We can expand more when they maybe recall memories in the rp.) Two years after they met, they've fallen for each other but they can either not realize it or they are both lovers. But they work so well together, it's like they're the same person. Both have their own unique, haunting, dark, sad past. One day, he is hunting when he finds a girl who's in trouble. He saves her and brings her back to their camp to be treated, which was risky. The mystery girl woke up and thanked them, then offered to take them to a very large group to stay. My character has had a bad past with them, but the current ruler of the group doesn't know her and your character knows she's had a bad past with them. They are cautious and are basically forced to join because they know that group could kill them in an instant. The girl they rescued and another man that's assigned to watch/assist them decide to break them up to weaken them. The ruler can tell they're not comfortable and want to leave ASAP, so they try to make them weak by separating them(if they're lovers) or seduce them (if they're friends). If they're friends, then when the other characters try seducing them, they realize they love the other.

(You'll definitely need to be comfortable playing and/or sharing side characters for this one.)

A spy was discovered and thrown into a cell to slowly die. As she searched for a way to escape, she heard a chuckle and called the source of the laugh out. A witty, sarcastic, humorous thief was in the cell next to hers. As much as he annoyed her- and that was a lot- she listened to him and helped them both escape. They had to travel a long distance clashing the entire way. She was a professional, reserved person while he... well he was a smartass who rarely took anything seriously. As they travel farther, hiding from soldiers of the kingdom who threw them in jail and fighting them together, they begin to fall for the other. But don't realize it. He only realizes it when they've almost arrived to her kingdom and is ready to confess. And only when they arrive at her original kingdom does the thief learn that she had an arranged marriage that the king had set up for being a loyal spy. He set it up with one of his more mischeivous sons who would most likely never inherit the throne. The thief is prepared to leave, but she insists he stay for a few more days and can stay for the wedding if he's willing. Soon he over hears the fiance talking about using her and then tossing her away. Somehow he has to stop the twisted prince before the wedding happens in only two weeks.

She was a princess who was riding her horse away from the castle into her sanctuary: the woods right behind the castle that was also surrounding the kingdom. She was mad at her parents, the king and queen for arranging her marriage with some random prince. She never even talked to him. She was too mad and stormed out of the castle. She was getting suspicious when no one went after her by the time she was mounting her horse. She stopped and looked back to see the castle was glowing, but it quickly faded. Soon after that, a frighteningly beautiful woman was in front of her, saying she had cursed the castle so that nobody could leave or they would die. It was a shame she couldn't curse her, but she could settle with having fun with her family and staff and fiance. The princess travelled to a well known powerful sorceror that she had heard about. Expecting a wise old man, instead she found a sarcastic and unprofessional young man just a year or two older than her. He agrees to help her but she travelled a very long way to find him. Now they have to travel all that way back and it will take time to bring down the curse. He often annoys her, but along the way they fall in love. They can either share some romantic moments before returning to her kingdom or like the previous plot the princess doesn't realize/admit that she loves him. He does and he's about to confess as he brings down the curse but right as he begins to confess, the curse is brought down and they rush into the castle and he's reminded that there's a fiance in the picture. Two possible twists: The prince was working with the sorceress/started to work with her after the curse to get rid of the princess and somehow get rid of the king and queen with the curse. OR the fiance was just a perverted douche.

Tell me which options you want.
Can also be reversed. I can be a sorcerer and you can be the prince.

Your character is desperate to make it look like he has a girlfriend because he's trying to make a girl jealous. He asks a few girls before finally deciding to pay a girl money for each time she has to pretend with him, the amount depending on what they do (cuddling, kissing). Eventually they both fall for each other, but they can't tell if their feelings are real or getting confused with their cover. She realizes she's fallen for him before he realized he's fallen for her, so she calls it off. He realizes he's fallen for her when she quits and it hurts that she's not around anymore. He finally got the girl he was making jealous, but he realizes it doesn't feel the same when he's with her.