Have you ever been trapped inside a building, with no windows, bright white medical lights, and stone cold walls? Not even knowing how long you've been in there, or how you even got there? After a while, you would ignore these questions and focus on one thing: getting out. But here's the twist: Your body has been altered. You're no longer human, you're a freak, a monster, a mutant, and not only that, you're trapped in a cold windowless building with other "things" just like you, but these creatures aren't so fortunate. They are considered failures, mutated beyond recognition, and they are angry, and they are after you. Now your only priority isn't escape, but survival.

That's what our cast had to go through. They woke up in this very stone cold building, changed and mutated against their will, sleeping for a period of 2 years. But they don't know this, all they know is that they aren't humans anymore, they're freaks. Upon waking up, they learn about their changes and figure out where they are: An old hospital people, with no people, but instead cold metallic medical supplies and weird creatures. They have their main goal in mind, escape, survival, freedom. But these kids don't think about just themselves, they refuse to leave this place without each other. It would be easy to abandon the hurt and save themselves, but these kids aren't selfish. They realize they need each other, because they are all the same, they are all mutants.

Now let's introduce our cast. We'll start with a pair of twins, both blonde haired and blue eyed. You are probably familiar with them; their names are Rin and Len Kagamine. Before they were altered, they were bright happy children of 14 years. They were mischievous but they were always there for each other, and they were always there for their friends. How were they altered you ask? Well let's start with the girl, Rin. She has been altered and fused with a dog. She has dog ears and a dog tail, and not only that, her hearing has improved and so has her smell. It can be considered a great advantage. Now for her brother Len. He was infused with a wolf. He has the ears, tail, and claws of a wolf. His claws are a great weapon, but the boy can't help but scare himself because of the deadly things that are now a part of him.

The next two I'm about to introduce are good friends, they have each other's backs and they are also the leaders of their little gang of friends. The first one is a young man named Rei Kagene, age 17. He has black hair and golden eyes. He can sometimes seem cold too people, and mean, but in reality, he's just extremely blunt and honest, it's just that people can't handle what he has to say. Despite this, he is very strong willed and determined, he will leave no one behind. As of now, he looks as if nothing happened to him, as if he wasn't mutated at all. But once you look closer, deep into his eyes, you can see thin wiring and sparks. That's right; you can say that he's now a cyborg. He has mechanical eyes that let him see far away, and see heat signatures through walls. He also has mechanical legs that allow him to run faster, jump higher, and fall great heights without damaging himself. He looks human, but you can tell by his eyes, that he's not entirely human anymore. The next boy is named Megpoid Gumo, age 17 as well. Before this, Gumo was very strong and caring. He protected those close to him and he was very kind to others. He was infused with a hawk. His bones are hollow and he has wings that protrude from his back that allow him to fly. His vision has also improved so when he is up in the air, he can see things down below him without problem.

Now there are two more of the gang that I decided to mention last for a particular reason. One I will mention now, the other you would have to wait to find out why. The first one is a young boy named Hibiki Lui of 12 years. This boy was very sweet; he was probably one of the only people in the world that had some shred of innocence still left in him. He was always happy and lovable, but he also had a determined side, he didn't like to give up. This young boy was infused with a rabbit. He has the rabbit ears and the joints and powerful legs of one. He can run and elude enemies with ease and he was very light on his feet. You're wondering why I decided to make this young boy be one of the ones mentioned last. I'll tell you why. This boy was captured by the very doctors who did this to him. The cast had no idea they were here, so when he was captured, they experimented on him and injected him with five extremely painful doses of a gene they called RH-156. This gene brutally altered the boys DNA and joints, and skin. The DNA that was in RH-156 was the tough skin of a Rhino and the hard shell of a turtle. He did not change physically, just internally. But here's what this gene did change about his appearance. He would glow a beautiful gold color, and his skin would become as hard and dense as lead. He would become the human shield. The effects however only lasted 5 minutes. They made him the shield for their greatest experiment yet. The girl.

The girl that I believe deserves to be mentioned last is Megpoid Gumi, age 16. Before she was a sweet caring girl. She was happy and bubbly and yes, she is the younger sister of Megpoid Gumo. She was always there for her friends and family, but she was also a klutz at times and sometimes clueless. She was fused with a cat. She had the cat ears and tail. Her hearing has improved x10. She hasn't had many changes done, nor does she have any special skills. You can see why she often felt useless to everyone, but she was very important to everyone, she gave them hope. Like Lui, she was captured as well by the doctors who changed them. They did the same thing to her that they did to Lui; they gave her 5 painful injections of a gene called CH-477, or what the doctors called it, The Chameleon gene. This gene didn't change her physical appearance, but instead her DNA. She is much like a chameleon, but different... she doesn't blend into her surroundings, she changes completely. She can become any creature she wants to be. She can change only her DNA though, not her appearance. If you are confused about what I mean, well you won't be any more soon. The doctors altered these two for a plan they have in mind. The plan won't be shown until later, but let's just say, Lui is supposed to be the shield for Gumi. They may not know if now, but Gumi will play a big part in the doctors evil plans, she will be the center of the plot from now on. All the characters are equally important, but they are just branches of the tree. What makes Gumi so special? Well… you'll just have to keep reading to find out.

Now we begin our story on the outside of the cold building where they went through so much suffering and pain. Battered and beaten, they face a world that is no longer the one they are used to. Buildings and roads are destroyed, cars burnt and flipped, and quietness, not even a bird or bug chirping. They are facing their apocalyptic home and now they have a new goal in mind: finding their parents.