So, I kind of based parts of this story of the Gravity Falls episode "Fight Fighters". I tweeked it around a bit before I was satisfied with it. I really enjoy sibling moments between Danny and Jazz. I really like the idea from the episode "13" that Danny beat up Jazz's boyfriend, mainly because I like the idea of Danny defending his sister even though he's younger than her. So, here's the result. It will be three parts in total. I hope you enjoy it. Please leave reviews and any questions or requests you may have. Thanks.

The door flew open. Danny looked up from where he was sitting at the kitchen table working on a math problem. Jazz dashed through the room and up the stairs, sobbing. He heard her door slam a moment later. What the heck?! Danny glanced down at his homework. Anything had to be better than this.

He walked up the stairs and stopped outside Jazz's door. He waited a minute before he knocked, not sure if should disturb her. But then again... He knocked on the door, "Jazz? Are you all right?"

He heard her clear her throat, "Uh, *sniff *, yeah I'm-I'm fine."

She sure doesn't sound fine. "Is it alright if I come in?" Danny paused. Jazz didn't say anything, but he heard her start to cry again. He slowly pushed open the door. "Jazz?"

Jazz was lying on her stomach on her bed. She turned to look at him, and he saw that her mascara had started to run down her face. It looked like some of it had rubbed off on her pillow.

Danny walked over and sat down on the edge of the bed, "What's wrong, Jazz? Did something happen?"

Jazz turned and sat up on the bed. She pulled her legs up to her chest and sniffed, "Well, you remember Mark right?"

Mark! Jazz had been dating him for around three months now. But Danny had always had a bad feeling about him. A scowl crossed Danny's face; he never liked Mark. Jazz let out a very soft chuckle, "I guess you do. Well, he and I had planned to go out tonight. I found him in the hallway with his friends, and I asked him when he wanted to go." Tears began to well up again in her eyes. Danny reached over, grabbed a box of tissues, and handed them to Jazz. She smiled and pulled a tissue out, "Thanks." She wiped her eyes with the tissue, "He laughed and- and he, um, he told me that we were through," she started to breath heavy, "and that he- he didn't know why he ever went out with me in the first place." She started to sob again. Danny rubbed her back, "Shh. It's ok, Jazz. Everything's going to be fine."

"Everything is not fine!" Danny yelled into his phone.

"Whoa. No need to shout," Sam said.

Danny pushed his hand through his hair, "Sorry. I'm just really ticked." He passed around his room, unable to sit, or stand, still.

"I know. But really, Danny, it's not a big deal. This kind of thing happens to girls all the time."

"I get it Sam. Girls get dumped. But not like this. That guy totally humiliated Jazz in front of all his friends. She's crushed."

"Look, Danny, you know I hate people who are jerks, but I know what you're thinking. And it's probably a bad idea."

"Come on, Sam. You don't know-"

"Haunting his house/locker/ and or anything else as Danny Phantom is not the answer."

"You don't know that that's what I was thinking," Danny muttered.

"Yeah, uh-huh."

"Look, Sam, I'm not just gonna let him get away with this."

Danny could hear Sam sigh, "I know you won't let this go. Just do this for Jazz, not for yourself and any kind of revenge you might feel like your exacting."

"Fine."

"And Danny? Be careful."

"What? You think I can't take him?" Danny scoffed.

"Don't make me answer that. See you later."