(Y/n) crossover x crossover harem

Prologue

(Y/n) = your name
(L/n) = last name

(H/c) = hair colour
(E/c) = eye colour

In the multiverse there is a universe
In that universe there is a galaxy, with a planet in it. On this planet is a city/town with a street that has a house/apartment building on it. In this building is a room.
In the room is a bed with fluffy pillows and a warm blanket covering a sleeping figure.

The sleeping figure is made up of cells. There also are millions of atoms that are made of elect- what do you mean this is too far down? Should I have stopped at the planet? The city? Oh the figure?

Right! So the figure stirs awake from the loud obnoxious sound of an alarm. Lifting their head up we see that it is none other than the protagonist of this here story, (Y/n) (L/n).

Their messy (h/c) hair and barely open (e/c) eyes indicating that they just woke up. They groggily climb out of bed and reluctantly stumbled out of their room and towards the kitchen

Pouring them self a nice refreshing glass of fruit juice they think back to the dream from last night

Just who was that man. And how many other me's were there? They ask them self

Flashback

Your PoV

Around me is just void. Nothing but pitch black all around, occasionally lit by a flash of light, almost like this abyss is breaking apart, or maybe this is just a dream and I'm waking up? But it feels almost too real to be a dream

???: "do not fear, (y/n) (l/n), for I shall guide you to the other side of the storm."

"Wh-who are you? What is this place? Am I dead?"

???: "where we stand is merely a space in between spaces, and do not fret, you are not yet dead"

"Space in between spaces?.. what does that mean?"
I ask with curiosity, almost as if every fibre of my being is calling out for the answer

???: "the multiverse is a chaotic and beautiful place. It consists of an infinite amount of worlds, every second another is born or another may die"

???: "When two universes collide, neither are effected, instead they simply pass through one another, leaving an imprint on the space they once connected"

"In doing so a new world is born, we call those worlds 'Crossover's. This is why you are here. You were left in the imprint as your world crossed paths with another"

"Are we trapped here? How do we get back to the Crossover or my world.. and why are my thoughts so loud?!"

???: "I am the one who took you from your world to offer the chance to go to the Crossover. The reason your thoughts are currently so loud, is rather simple. You are not the only you here"

"Huh? I don't get it"
I reply with a hand massaging my temples to ease the increasing headache

???: "each world that crossed over has a variant of you. And now they are merging with you mentally"

???: "If you do choose to take the offer and go to the Crossover, your headache will feel better. Or you will wake up in your home world as if this had just been but a dream"

"Variants of me?.. how does that work? Am I just going to become a me made from parts of each variant, like the hair from one and eyes from another?"

???: "you will eventually learn to control your physical form to become any of them you please, until then you will gain all their base skills in your current form"

"If I do go.. will I be able to return home?"

???: "there will be an exact copy of it in the Crossover, all your family and friends, even your belongings"

"I..I think I'm ready to choose.."

End flashback

It felt so real..

Mom: "(y/n)! Something came in the mail for you"

Dad: "I think it's from the new school.. what was it called?"

"It says here it's from.. Some fancy university called Traicere University"

Mom: "go on. Open it"

I slide my finger under the seal of the envelope and carefully slide the letter out.

"It.. it says I've been excepted to attend Union High"