This story is a spin-off of my other story 'Heart by Heart'. It takes place years later, when Allison and Jeremy are gone, and Rainy and Helena are teenagers.

I've made a few changes from the original other posted, just a warning.

Also, if you haven't already read 'Heart by Heart', you should do that first, cause otherwise, you'll be very confused.

Summary for 'Heart by Heart':

Jonathan/Sebastian kills Clary in front of Jace- or so he thinks. Clary's body was never found. Clary was rescued by a group of Shadowhunters from the future, they trained her for two years and give her a disguise rune from the future. She comes to live at the Institute again under a new name and can't tell Jace or anyone who she really is. Clary has to conceal her feelings for him

Sixteen-year-old Douglas Williams trotted down the steps of the Subway station. It was always very busy at this time of day, right after school let out. Dozens of other high school kids took the train home, too.

Doug was from Brooklyn. He didn't know why his mother thought it would be a good idea for him to go to school in Manhattan. It just meant taking the public transit twice a day, and added an extra two hours to his time not at home.

He got on the train, and tried to find a seat. He settled next to an old lady, who looked like she couldn't wait to get off.

Someone went in front of his and held the pole. It was a man, but there was something odd about him. Doug stared for a long time at him.

"Caution," said the voice over the intercom. "The doors are about to close."

The man glanced over and noticed Doug staring. He made a growling noise, and that's when he flashed into a thing for a brief second.

Doug jumped and made a sound of surprise. The old lady next to him gave him a look, and the man glared at him. Doug swallowed.

The man gripped Doug's jacket and yanked him up.

"Hey," he said. "I didn't mean to stare," he tried to reason. "I thought you looked like the guy who was in Terminator," he lied.

The man began to drag him down the car.

"Okay," said Doug. "Can you let go? I kinda like this jacket."

The man opened the door to the next car, and yanked Doug into it. It was vacant. He threw him down.

"Ow," Doug scrambled backwards. "Okay, I don't actually have any money. I have a Java Jones punch card, will that work?"

The man turned from the man into the thing he'd seen briefly earlier.

"Whoa!" Doug moved further back. "What the hell is this?"

The thing growled, and started at him.

Suddenly, the back door opened, and someone came in. "Hey!"

The thing turned around.

Doug glanced around it and saw a beautiful brunette girl in black, with a knife in hand. She was scowling at the thing.

"Why don't you stop picking on mundies? Come and get me, ugly!"

The thing growled, and started at her. Doug's eyes widened.

"Michael," she said, and her knife started to glow. Doug raised his eyebrows.

The girl came at the thing, and her knife went through it's chest. It screamed, and so did Doug- though he tried not to.

The thing fell to the ground, then folded into itself.

Doug stared at where it had been. "... What the hell just happened?!" he demanded, looked up at the girl.

She frowned at him. "Wait, you can see me?"

"Yes! You just killed someone! What the hell are you thinking? I'm calling the cops!"

The girl snorted, and rolled her eyes. "Cops? Wow, mundanes never change."

Doug stepped back. "What happened to him? How did he disappear like that?"

The girl gave him a mysterious smile. "Wouldn't you like to know." Doug wished she wasn't so pretty. It was distracting.

"... You're going to kill me, aren't you?" he said with slight fear in his voice as realization hit him.

She girl scoffed. "Um, no. I don't kill mundies."

"Yeah, what are mundies?"

"Humans," she smiled.

Doug scoffed. "So what, you kill animals? Are you part of some freaky devil-worshipers clan or something?"

The girl raised her eyebrows. "Devil worshipers. Interesting. As a matter of fact, no, I'm just the opposite."

Doug frowned.

She walked up to him and offered her hand. He scoot back more. She rolled her eyes, then tucked her knife into her belt, and offered him a hand again. "Come on, it's just a hand."

Doug hesitated at first, then took it, and she helped him up. She was exactly eye level with him in her high heel boots. She was surprisingly strong, too. "What's your name?"

He frowned. "I don't know if I should tell you that..."

She rolled her eyes. "Oh come on, really? Well, I'm Rainy. Nice to meet you."

He just stared at her.

She sighed. "Look, I'm going to need to take you back with me, so you might as well tell me who you are."

He backed up. "So you are going to kill me. I won't tell anyone, I swear."

She groaned, and rolled her eyes again. "Weirdo," she muttered. She pulled out her phone and put it to her ear. "I got the demon... Meet me in the last car, I found a mundie who can see us," she hung up.

"Demon?" Doug scoffed. "So, what, you're mental?"

She rolled her eyes. "No, you're just blind."

Doug scoffed. "I'm clearly not blind."

She pursed her lips. "That's the point."

The door opened again, and in walked another girl. They both had strange tattoos down their arms.

Doug put his hands up. "Please don't kill me. I've never kissed a girl before."

Rainy snorted.

The other girl walked up beside Rainy. "He can see us?"

"Apparently so," said Rainy. "Helena, Mundane boy, Mundane boy, Helena."

Helena rolled her eyes. She was pretty, too, he noticed, with her long gold curls, and green eyes, but in his opinion, Rainy was prettier. "We're not going to kill you. What's your name?"

Doug said nothing.

"I'm calling him Mundane for now. He doesn't want to tell us his name. He's convinced we're devil worshipers or something."

Helena barked out a laugh. "Just the opposite, Mundane."

"That's what I said," said Rainy. "Anyway, I think we should take him to the Institute, ask Aunt Clary what to do with him."

Helena looked at him. "... Are you sure that's safe, Rainy? He could be-"

"He's harmless," said Rainy. "Trust me."

Doug frowned. "I'm not harmless!"

They both looked at him and smirked. "Yep," said Helena. "Okay, I'll open a portal."

Doug frowned. "Did you both escape from the mental hospital or something?"

They ignored him. Helena pulled out a foot-long wand-looking thing, and began to draw on the wall of the train.

"Graffiti," Doug said flatly. "Nice. Is that your clan symbol or something?"

The mark on the wall began to swirl, and Doug's eyes widened. It turned into something else entirely, and Doug stumbled back. "What the f-"

Helena laughed. "Come on, Mundie, you need to see her. She'll determine your fate."

They both grabbed his arms. "H- hold on," he was genuinely scared now. "What the hell is this?"

He got pulled through the portal, and then he fainted.

It might take a little bit for the next chapter because I have to change a few things and/or write them.

I hope you liked it, and the second chapter is coming! I'm gonna try and post it today.

Hope you liked it!

Wisterian Princess