The song Celia used was one of my daughter's favorites, it sounded like this...

She's just a girl and she's on fire
Hotter than a fantasy, lonely like a highway
She's living in a world and it's on fire
Filled with catastrophe, but she knows she can fly away

Oh, oh oh oh oh
She got both feet on the ground
And she's burning it down
Oh oh oh oh oh, oh oh oh oh
She got her head in the clouds
And she's not backing down

This girl is on fire
This girl is on fire
She's walking on fire
This girl is on fire

Looks like a girl but she's a flame
So bright she can burn your eyes
Better look the other way
You can try but you'll never forget her name
She's on top of the world
Hottest of the hottest girls, say

Oh, oh oh oh oh
We got our feet on the ground
And we're burning it down
Oh oh oh oh oh, oh oh oh oh
Got our head in the clouds
And we're not coming down

This girl is on fire
This girl is on fire
She's walking on fire
This girl is on fire

Everybody stares as she goes by
Cause they can see the flame that's in her eyes
Watch her as she's lighting up the night
Nobody knows that she's a lonely girl
And it's a lonely world
But she gon' let it burn, baby, burn, baby

This girl is on fire
This girl is on fire
She's walking on fire
This girl is on fire

Oh, oh, oh
Oh, oh, oh
Oh, oh, oh
Oh, oh, oh
Oh, oh, oh
Oh, oh, oh
Oh, oh, oh

Oh, oh, oh
Oh, oh, oh
Oh, oh, oh
Oh, oh, oh
Oh, oh, oh
Oh, oh, oh
Oh, oh, oh
Oh, oh, oh
Oh, oh, oh

She's just a girl but she's on fire

I realised it... I'm in love with Zero...

Flashback:

X, Linda, Marcus and Celia were struggling theirselves against Sigma, but for them it was too hard to do it

Marcus: Man! Sigma is tough!

Linda: X... I don't think we can't handle him any longer...

X: I know Linda... but we can't give up...

Celia: If somebody can at least help us...

Marcus: Hey! Where's Zero?!

Celia: I don't--- AHH!

Linda: Celia!

Sigma grabbed Celia by her arm and put his sword in front of her face

Sigma: I got you now!

Marcus: Sister!

X: Sigma! Let Celia go!

Sigma: Never! She's an human! And she doesn't deserve to live!

X: Well, my girlfriend is an human! And she and her family deserve to live! So you must let her go!

Linda:(blushes lightly but concentrates) X is right! Now give Celia back now!

Sigma: Now she's mine!

But before Sigma could do anything, somebody pushed Celia out of the way and, before someone noticed, Sigma exploded.

Marcus: Huh?! What happened?!

Linda:(runs towards Celia) Celia! Are you okay?!

Celia: I'm... fine...

X: Wait! Is that--?!

Right besides Sigma's head and pieces, Zero was on the ground with a stab on his chest, his Z-Buster was cut off and he was all burned

Everyone: Zero?!

Celia: (gasps and puts Zero's head on her lap)

Zero:(weakly) Ugh...

Celia: Zero? Are you okay?

Linda:(thinks) Oh no... he's in a very bad condition...

X:(thinks) No... Zero... please... not this again! Don't!

Zero: I'm... alright...

Celia: W-Why did you do this? Y-You didn't n-need to...

Zero: I... had to... I can't let a human die... especially you...

Celia: Well... I have to say, you saved me again...

Zero: I... know... (breathes slowly)

Celia: Z-Zero?! You are--?!

X: Zero! No! You can't!

Linda: N-No... he's not going to make it...

Marcus: What?! You can't be serious!

Celia:(sighs) This is my fault... I shouldn't have dragged you into this...

Zero: It's... not your fault... I had a reason to do it...

Celia: Well... I had a reason to don't drag you into this... and this is why...

Just then, Celia planted her lips in Zero's and as she broke the kiss, Zero had his eyes closed

Linda: Z-Zero?!

X: Zero? ZERO!

Marcus: Is he...?

Celia: He's gone...

X:(sobs) N-No! Not this again! Why?!

Linda: X! Calm down! (Hugs X tighly)

X:(sniffs) Thanks Linda...

Linda: It's okay... let it out...

Marcus: Sister... why did you kissed him?

Celia: That was my reason... I love him with all my heart...

Marcus: Wait! What?! Why?

Celia: He is the guy that demostraded me the meaning of true love, and he also liked me from who I am on the inside

Marcus: I'm... so sorry Celia... I didn't wanted you to lose him...

Celia: It's okay... at least... Sigma's gone for now... our mission is acomplished now...

Marcus: Okay... if you say so...

After that chat and that X was fully calm down, the four hunters went back to their base, leaving Zero's corpse behind

One day later...

Celia was on her computer with a little sad look on her face, and just then, Tania and Danny came to her room

Tania: Hey Celia... are you okay?

Celia: I'm fine Tania... don't worry... any missions for today?

Tania: Um... no... well... I better leave you and get back to work...

As Tania leaved, Danny looked at his friend with concern

Danny: Celia? Why do you look so depressed?

Celia:(sighs) I still miss Zero... I just want to get it out of my head... but I can't...

Danny: Well... don't worry, you'll get over with that... you just need sometime... I'm sure you will still love him in your heart...

Celia: You're right Danny... just let me think about it...

Danny: Okay...

As Danny leaved the room, Celia signed and then looked up

Celia: If only I had the chance to tell him why I kissed him... I could have tell him that---

???: You don't need to... I already know...

Just then, someone entered to the room, and as Celia turned around, Zero was standing in front of her

Celia: Z-Zero?! But how--?! (Starting to back away)

Zero: Just to let you know... it's something that I can't explain...

Celia:(still backing away) Okay...

Zero: Anyways... I couldn't tell you why I had to save you and I want you to know it... and it's the same reason you had...

Celia:(now placing her arms at her desk, since she couldn't back away anymore) And what was that--?

Before Celia could finish, Zero just pulled her into a kiss with his arms at her waist; Celia took it by surprise, but then kissed back with her arms at the hunter's neck and then broke the kiss and put her head in Zero's lap

Zero: I love you...

Celia: I-I love you too, Zero...

Little didn't they knowed that their friends we watching the whole thing and they couldn't help but feel happy for them, Olivia and Susie were smiling for their older sister for finding a boyfriend and Marcus couldn't help but cry at his sister's confession at her love. X and Linda also smiled at both of their friends as they were hugging each other and couldn't help but look at the new couple with happiness

End of Flashback...

I had tears on my eyes... Celia finally found her love... just like Linda did... I'm so proud of them...

Zero... please take care of Celia... I hope she is safe with you...

I couldn't help but cry at my girls, at first they had abusive boyfriends, but now, they have very nice couples that protect them. I'm proud of that

All the other things that were written were about their adventures...

I spent the days reading them, especially Lily's adventures too

A week has passed and I still don't know why my girls didn't returned...

Untill... I came across notes on their books... which now told me why they didn't returned...