Before we begin, yes, you were originally from GZtale, and you were pretty much Ganz and GZ! Papyrus' older sister. Now, onto the story!!!
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(Y/N)'s POV

"So, this is what happened. So, my parents, were an odd couple. My father was a monster, a demon/dragon monster hybrid, and my mother was a human. My father was part of the royal guard, and good friends with the king, and so was my mother, except she was in the army. I was born just before the war between monsters and humans happened. I was given to the royal family, while my mother and father fought for their sides, and they ended up killing each other. Sooner or later, the monsters were banished to the underground, forgetting me. Not long after that, like, when I was a year old, the queen gave birth to a boy. So, I was given to the royal scientist, unfortunately. His name was W.D. Gaster. He was a crazed lunatic. God, he did science experiments on me, except for one. He created 2 skeletons in gigantic test tubes filled with a substance. When they opened their eyes, they saw each other first, and they glowed their eyes at each other. Since I started training early, I could sorta glow my eye, but not by much. They noticed this, and they kept flashing their eyes at me, and vice versa. After a while, Gaster finally noticed, and got them out. I gave them names. I named the first one Sans, and the second, Papyrus. And then he continued doing experiments on us. Sooner or later, I completed my training, and so did Sans. I was around 7, Sans was about 5, and Papyrus was about 3 months old. One day, Gaster came back from work, and didn't stop to say hi. You see, since me and Sans were done with training, Gaster let us live In an actual home. It was my job to take care of my brothers, while Gaster was at work. But anyways, Gaster went in the kitchen, so I decided to check on him. I told Sans and Papyrus to stay in the living room, but little did I know, Sans followed me.       I went into the kitchen, and asked Gaster if everything was okay, but he had other plans. The room went. Black and white, and that only meant one thing:
A monster wanted to battle.
I didn't understand at all, but Gaster summoned sharp edged bones and I shook in fear, and just before they hit me, they stopped. The room went back to normal, meaning the battle ended. He was extremely disappointed in me, and told me that since I was part monster, I couldn't have determination. I could feel all of the feelings, except that one. He held out a pill and told me that they were a type of determination pill, and told me to take just one. He said that it would give me 30% of determination back if I took one every week. So, being the little idiot I was, I took, just one. I began to cough and wheeze, and he didn't do anything about it. He just walked away, but I wasn't about to let that happen. I summoned bones and sent them his way, and he dodged them. I sent gaster blasters his way, and he dodged those too. I was out of energy, and he said he was a little bit proud of me. But being the monster he was, I cried and screamed at him, saying that that was NOT a fatherly thing to do at all. He then said the few words I never wanted to hear in my entire life. He said:
'Who said I am your father? I never was and I never will. My job was to take care of you, not to raise you into a coward. And clearly, I have raised one hell of a coward.'
I became so sad, that I went into the bathroom and cried. Just cried. For hours without end. Then I looked into the mirror and saw that I had these marks, and that my eye changed to look like Sans' eyes. I truly then, turned into a monster. Sooner or later, Ink found me, took me to an elemental dragon to learn dragon slaying magic, then took me back after I mastered it and raised me the rest of the way." I told him.

I realized I was crying. I always did when I told that story. The next thing I knew was that I was being hugged by a crying Natsu. I hugged back, I really need one. We just hugged each other and cried for a few hours.

"S-so, I guess you've never had a true f-family, huh." He said. I nodded. It was true. "Well, your lucky. Fairy Tail is your new one, and we will make sure that you won't feel that ever again." He exclaimed. I nodded, and and looked him in the eye.

I lean closer to him, him blushing a lot, and I stay like that for a few seconds, until I kiss his cheek. "Thanks for letting me know. But the past is the past. I know it won't happen again, at least, I hope it won't." I tell him, and I jump from the tree, landing perfectly. I then walk back to the guild, blushing a little.

Natsu's POV

Holy shiz! She kissed my cheek! I've made up my mind! I have fallen in love! Let's just hope Happy and Mira don't find out, or that could be trouble.