Only the story belongs to me. You look like this guy. 

Aside from the obvious weapons your arm can turn into a minigun. Take it away Terumi.

Terumi: ENJOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYY!

You were trying to enjoy a nice day without killing anyone but then some jackass wearing some kind of yellow raincoat showed up.

Terumi: You must be one of Kokonoe's failed projects. How does it feel to be unfinished?

You folded your arms.

(Y/N): Bite my shiny metal ass.

Terumi: Oh, we got a feisty one here.

(Y/N): You do realize that because of everything you've said I get to rip you a new one later right?

Terumi: HEY! Breaking the fourth wall's my thing!

(Y/N): Just piss off already. STRAIGHT NIGHTMARE!

You fired a dark purple energy from your shoulder cannon nailing him in the face and sending him somewhere far away from you.

(Y/N): Ugh. I can't stand blabbermouths.

You started looking around for your target Jin Kisaragi. Thankfully due to plot convenience he, and three other people, were on a platform below you. So you jumped down from where you were, firing a hail of missiles as you fell most of which hit Jin. When you landed you put your foot on Jin's face.

Sword guy: The Hell?

(Y/N): I'm not here for you. Just for him.

Sword guy: Like sh*t you are. If anyone's going to kill him it's me!

You aimed your minigun arm at him and he immediately raised his arms in surrender.

(Y/N): You were saying?

You kicked Jin off the platform. Prompting the others to attack you. You flew away, later to be stopped by three girls wearing some type of armor and surrounded by swords.

(Y/N): What do you want?

Lambda: I am Lambda 11 of the Murakumo unit.

Mu: And I 12

Nu: And I 13

All: And we want you!

You were going to say something until a bullet hit you in the back of the head and broke your helmet, revealing your beautiful face to the three and knocking you out. When you woke up you realized that your shoulder cannon and missile launcher had been removed. Oh, and you were also in a bed with the three girls who were snuggling into you and covered with blood. You sighed, smiled, and fell asleep trying to return their embrace.

~The End~

Okay I know I'm kinda breaking my "No Yanderes" rule but I didn't write the yandere part.