(A/N: Swiftdragoon had requested this one-shot, and it's actually Abused, Bullied, Cheated and Betrayed Omega Zero Male Reader x Yandere, Caring, Betrayed and Vengeful Gender Bent Megatron, Optimus Prime, and Charlotte x Infinite Stratos.)
(Y/N L/N didn't have the best life. He was abused by his parents when he was young. His time at school were like hell because he was bullied constantly. And making things worse, his ex cheated on him with one of his bullies. But he snapped when he was framed for a crime he didn't commit, and got kicked out of school. His parents also disowned him, and now he is abandoned at the streets.)
Y/N: What the hell did I do to deserve this?
(One day, he was walking in the streets when he suddenly got blown away by a blast and crashed into a van.)
Y/N: I guess... this is how I die...
(Suddenly two female cybertronians approach Y/N, and glare at each other.)
????: Look what you did, Megatron!
Megatron: What I did? You're the one who recklessly shot close to him, Optimus!
Optimus: And you still got some nerve to blame me!
Megatron: Shut up!
(Suddenly a biometal approaches the unconscious Y/N, and he becomes something else.)
(Optimus and Megatron turn their attention to Y/N, who now became Omega Zero.)
Optimus/Megatron: Hey, are you alright?
Y/N: ....
Optimus: Come on, say something.
Y/N: Who are you?
Megatron: I am Megatron, Leader of the Decepticons. And this is my archival Irina Pax, or as the rest of the humans call her... Optimus Prime, also known as the girl who blasted you away before you... you know...
Y/N: Ware wa messia nari. Hahahaha!
(Y/N charges at Optimus Prime, attacking her.)
Optimus: Hey, that was an accident!
(He keeps attacking her until Megatron finally decides to take action.)
Megatron: Okay, that's enough.
(Omega Zero suddenly stops as he looks at Megatron and Oprimus before passing out.)
Optimus: Okay... let's call it a truce...
Megatron: A truce...
(They took Y/N to a hidden place, not knowing that someone is watching them from afar. It's Y/N's only childhood friend Charlotte Dunois, former student at IS Academy.)
Charlotte: Poor Y/N... If only I could have done something about what you went through... and now that I am free from those traitors, I can finally see you again, my friend... no, my love.
(Flashback)
(Charlotte is seen in the IS Arena as she uses her IS Suit and massacres Ichika, but she takes things too far and kills him, much for her classmates' dismay. Since then she has been blamed for the incident and got expelled from IS Academy. She vowed vengeance since then.)
(Flashback Ends)
Charlotte: Time to have my man.
(Timeskip)
(Y/N wakes up in an unfamiliar place, and then he sees the two female cybertronians.)
Y/N: Where am I?
Optimus: In our hideout.
Y/N: What, but weren't you rivals?
Megatron: Once upon a time... we were...
Y/N: So then, what changed you?
Optimus: First, you...
Megatron: Second, we have been both betrayed by our respective factions.
Optimus: My archrival Sentinel Prime blamed me for an incident in Mission CIty, and all Autobots believed in him.
Megatron: And that bastard Starscream almost killed me in an attempt to dethrone me, and he managed to do so by forming a rebelion against me.
Y/N: Well, I guess we're not so different after all. (looks down) My former parents abused me, I was bullied at school, the principal and staff neglected me, and my ex-girlfriend cheated on me... (sobs) not to mention I was framed for a crime I never committed, and my former parents disowned me.
Optimus: What the hell?
Megatron: Of all reasons to hate humans...
(Suddenly Charlotte comes in.)
Charlotte: Hey, Y/N.
Y/N: Charlotte?
Optimus: You know her?
Y/N: She's my childhood friend.
Charlotte: Y/N, I'm sorry about what you went through...
Megatron: How can we be sure you won't betray him like the rest of the humans?
Charlotte: Because I was betrayed as well. The Academy I used to study at expelled me for killing one of my classmates.
Megatron: Hmm... I guess I'll trust you.
(Then the Biometal O speaks to Y/N.)
Biometal: Greetings, Y/N.
Y/N: Who are you?
Biometal: I am the one who gave you the power. I am Biometal O, or Omega if you prefer.
(Y/N then remembers how he recklessly attacked Optimus Prime.)
Y/N: So... I...
Omega: Your suffering made you the ideal host for my powers of Omega Zero. Now go and get your revenge on those who wronged you.
(Y/N smirks and decides to use the biometal.)
R.O.C.K. ON!
(Y/N becomes Omega Zero again.)
Y/N: Ware wa messia nari! Hahahaha!
(Timeskip)
(A massacre happened in the town, all of the school students, teachers and the principal have been killed by the "Renegade Four", and now Y/N (Omega Zero) is seen grabbing his former parents in their necks while Optimus, Megatron and Charlotte torture his ex-girlfriend.)
F/N: (weakly) You...
M/N: (weakly) Why?
(Y/N says nothing as he kills his former parents by cold blood, and his teammates/girlfriends do the same to his ex-girlfriend. Unforunately some IS Pilots, The Autobots and The Decepticons come in.)
IS Pilot: Stop!
(Y/N turns to see the IS Pilots.)
Y/N: Hmph! Think you can stop me? Hahahaha! Girls, let's put those bitches in their place!
Charlotte: (nods) Okay, darling. (smirks) Let's dance!
Starscream: Decepticons! After them!
Sentinel: Autobots! Attack!
(Omega Zero has no problem slashing down the IS Pilots, including Houki, Cecilia, Laura, Rin and Tatenashi.)
(Optimus Prime easily overwhelms her former friends, and Megatron does the same. Charlotte shoots Sentinel and Starscream down.)
Charlotte: Take that, scums.
(Then Omega Zero crushes Chifuyu's skull before tearing Bumblebee in half with a rolling slash. He charges his saber and kills Soundwave with a powerful burst. The massacre goes on until all of their enemies drop dead in the ground. The "Renegade Four" laugh maniacally as they celebrate their victory.)
(Y/N and Charlotte helped both Optimus and Megatron to rebuild Cybertron, and Y/N became the King of the rebuilt planet with Optimus, Megatron and Charlotte as his queens.)