A/N: This is my first Hey Arnold! fanfiction story since "Arnold's Youth Potion" and it's crossover with Codename:Kids-Next-Door as they get to know that this is my first love triangle story and I bet that you're going know that it tells a story of a certain, what Helga called him, Tall-Hair-Boy is love with her best friend Phoebe whom that she had a crush on him since the Season 1 episode "Operation: Ruthless", however it seems that Abgail Lincoln, also know as Numbuh 5 of the Kids-Next-Door As they could make sure as they get to see as they happen as they would know that as they might had to noticed that when these girls might get over to our favorite tall hair boy, it was a strong love Triangle so if you're a fan of Hey Arnold! from Nickelodeon, Codename:Kids-Next-Door from Cartoon Network, which those networks own those shows by the way, or maybe even both, then my dear friends, this is the fanfiction crossover story for you.

Chapter 1: The New Girl In Class

It was another day at the P.S. 118, as the kids had to go inside the school as they get to make it as they could get enter though the class.

"Gee, I Thought the weekend would never get to end." said Gerald.

"Me either, I can't wait to start the school week all over again." said Arnold, our football-headed-friend.

As they get to Mr. Simmons Class, Gerald get to be seeing Phoebe. "Hey there Phoebe, I think that you have the hard working weekend, huh?" said Gerald.

"Yeah, I had to read a lot of books and I had to practice fencing with my father and then there could be that happen to make sure that I get to make sure that I could make up for the story that could be that I had to study hard enough, just in case that I get some 'A' Pluses."

As Mr. Simmons get to appear as he makes an announcement.

"Good morning class, today, we have a treatment today," he said. "We got a brand new student today, she came all the way from Gallagher Elementary, she's the smartest kid in the class and she get to be temporally a student for a week."

As the kids hear about it, they get to meet this new student right away. "I think that you shall all feel welcome to our temporally student, Abagail Lincoln." as she get to walk in.

"Hello everyone," She said. "My name is Abagail Lincoln and I came here to be temporally student for a week, and I think that it could be that it was seriously that I might get to learn twice as much as I ever did back at my school."

As the class clapped, she had to take her seat as she get to make sure that she gets to see that she might had to be that she would be that she get to seated between Phoebe and Gerald."

"I think that this kid is going to be that she gets to be that smarter." said Arnold.

"Oh really? I think that she could be my kind of girl." said Gerald.

As Phoebe get to turn over to Abagail. "Hello, my name is Phoebe, and I hope that we get to get along."

"Get along?" Asked Abagail. "Please, I think that my friends could never get to be that never happen to make sure that I get to noticed that she was able to make it as they might had to be that no kid that could be so smart." as she chuckled.

As Phoebe get to Abagail to her as she introduce herself. "Hi, I'm Phoebe, it's so great to meet you." as she expected a hand shake from her as she get to see that the might had to be that quite as she doesn't get to buy from there.

"Yeah, charm, I'm sure."

As Class get to be started, Helga get to make spit balls as she get to spit at Arnold, but Abagail caught the spitball at her hand as Arnold looked into her. "She started it." As Helga looked at them and she asked. "What?"

As Gerald get to focus as he get to make sure as they get to make sure as they get to study harder as Gerald get to take a look at her as he get to noticed that he has a crush, but as Abigail get to take a look at him as Gerald get back to studying.

When the kids are done studying, Mr. Simmons told them "Okay, time's up class, I need you to pass your papers to me and then I'll have to grade them." and so as the kids get to be that up, they knew that they could know that Gerald get to know Abagail more.

Come back next chapter as we get to see as much as he gets to know her more, and then later, we went Phoebe asked Helga for her advice.

Please make some comments on the comment section and have a nice day.

Closing Note: I had to make this chapter long so I think that I could be lucky enough that I get to be possibly doing it and so.

Second Closing Note: I think that you should know that I think that I had to stretch out my break time every now and then.