Black Heart and Black Sister stood in front of Y/n, Nepgear and Yuuki as Black Heart has her blade at them while her soldiers trace their weapons at them.

Y/n: Noire what are you doing? We are trying to stop this war and we have a lead that whatever is going on at Planeptune must be there. You have to let us go.

Black Heart: I'm sorry but I can't let that. Spies from Lowee and Leanbox had infiltrated Lastation and I'm sorry but I can't take any chances.

Nepgear: You have it all wrong! Please you have to believe us!

Black Sister: If you cone with us, maybe we can clear things up.

Y/n: We have no time. This person is at Planeptune and we are going there to stop him and put a end to this war. Order your soldiers to stand down and let us go.

Black Heart: I have a duty Y/n....I hope you can understand.

Y/n:....I do....and I'm sorry.

Immediately he transforms in to Red Heart stealth form, he grabs both Nepgear and Yuuki then they turn invisible. Onde they were gone the two look around for the but they were gone for good.

Black Heart: (sigh) Idiot.

Black Sister: Do we have to track them?

Black Heart: Check inside the prison and seardh around for them.

They comply and they spread out. We then cut to outside od Lastation and see the trio land in the forest then Red Heart deactivate his invisibility and look around.

Yuuki: Looks like we are clear.

Nepgear: I can't believe they were about to arrest us.

Y/n: They're just protecting the nation. Don't worry, once we find the true master mind, things will be over.

Yuuki: Right so what's the plan?

Y/n: We know this person is at Planeptune so all we need to do is to head back and find him.

Yuuki: Would be hard since we have no idea where he is?

Y/n: I know but we gonna try.

Nepgear: Then what are we waiting for? Let's head back to Planeptune.

With that the trio make their way back as soon as possible and hope they can end the nations war before it is too late.

(Sometime later)

When they arrive to Planeptune it was in chaos. Lowee, Lastation and Leanbox forces is attacking Planeptune which shocks Nepgear and deeply is worried about Neptune so she change into her goddess form and flies towards neps tower.

Yuuki: Nepgear!

Y/n: Leave her. She'll help out Neptune while we look around.

Yuuki: Right. I'll check the south and west.

Y/n: North and East is mine to take. (Smirk) Let's see who finds it first.

Yuuki: (winks) That would be me.

She use a smoke bomb and disappear while Y/n transforms to Red Heart and flies towards the city and begins his search. The battle rages on as soldiers from different nations are just fighting each other and costing a lot od destruction.

Red Heart flies around as he looks around anything suspicious but nothing so far. He also help out a few civilians that are caught in the crossfire and gets them to safety.

He shields them from incoming bullets, remove fallen ruble, rip car doors open and carrying them in the air to the nearest safety point.

Not only he had to search around for a base but he had to save lives. Everything is in chaos and many nations soldiers fire at him, thinking he was threat even though he tells them that he is getting people to safety.

We see him getting people to the subway to safety when a soldier from behind aims a rocket Launcher at him and then fired.

Red Heart was hit from behind and collapse to the ground which he begins to get stress out.

Red Heart: I'm saving people! Why can't you see that?!

A few more came ane they begin to open fire all him as bullets continues to hit him. He takes the shots however stress begins to build up so he grabs a nearby car and throws it at them.

They quickly move out od the way just as the car crash and then blows up. Red Heart breaths heavily as stress is building up but he calms down then goes back to searching around.

However he gets shot by jets, tanks and kore missiles. Then an explosion knocks him off and he crashes to the ground. Red Heart slowly gets up as he then close his fist and then punch the ground.

Red Heart: Come on! This is starting to get annoying!

He gets up then he looks over to the Nep tower and then he flies over. He enters the living room and looks around for anyone in but there was no one but then he heard.

Mark: Y/n?

He turn to see Mark there as he reveal himself while Red Heart turn to him and ask him.

Red Heart: Mark. Glad to see you. Where's the girls?

Mark: Purple Heart and Purple Sister are battling the soldiers right now. Where have you been?

Red Heart: We've been looking for the person who is responsible for all of this but its a bit harder since a war is happening.

Mark: Indeed. You think he's here?

Red Heart: Yeah. Maybe you can help out.

He then transforms back to his human form and then walks towards the window and tells Mark while looking through the window.

Y/n: Maybe you can help me by tracing where the person is at. If he's around here, we may find him.

Mark:..........

Y/n: Mark? Mark are you-?

He turn around then his eyes widen in shock as Mark had a shock expression all awhile a blade was throw his chest. The two of them stood there and then the blade was pulled back and Mark collapse to the ground.

Then The Assistant came out of the shadow with his blade arm in hand then says in a cheerful tone.

The Assistant: No need. I am here.

Y/n: (shocked) What?! Your the one that started off of this?! Why?

The Assistant: My true master wishes to be the only God in this world. He planned very well and now all the four nations army and soon the four goddess will be here and they will meet there fate.

Y/n: So this was your plan? Have all the four goddess to be in one location so your master will kill them. How?

The Assistant: It is very simple.

He then opens his chest to reveal to be the same crystal that Y/n found in the ruin nation that makes him aggressive. Y/n can feel it now as he steps back while The Assistant approaches him.

The Assistant: Goddess and gods have fought Goddess and gods before....now.....it is time for the goddess to fight a devil. You are that devil Y/n. You....be the one to kill them.

Y/n: No.....No!

He then pulls out his pistol but The Assistant quickly grab his arm and then kicks him against a window and then he grabs him by the neck and lift him off his feet while exposing him with the red crystal which cost Y/n's eyes to become Red.

His rage and anger takes control of him which he begins to struggle but The Assistant grab us other arm and pinned him against the glass and exposing him more and more.

Mark while injured sees this then spotted Y/n's pistol so he crawls over to the pistol and then he grabs the pistol and turns and shoots The Assistant.

He gets up and kept shooting which damages The Assistant until he fire a shot through his head and he collapse and Y/n drops to the ground.

The red crystal keep glowing while he can hear whispers as he kneel down and grab his head while Mark gets to him.

Mark: Y/n! Y/n can you hear me?! Y/n!

Y/n begins shaking then his hand move towards the red crystal and when he touch it the red crystal gives off a massive glow while Y/n mutters out.

Y/n: Mark......run!

Immediately Mark runs away while Y/n begins to change as everything around him begins to shake and soon falls apart.

The red glow can be seen by everyone as they all look uo at tye nep tower and suddenly the top of the tower blows up. Mark lucky got away from the explosion but he peaks out and in horror he sees a large figure that looks like a demon.

Mark: Y/n?

The large figure stomp his large feet and then turn to the veiw and then leaps out. He drops down until he crashes onto the ground in front of the four nations soldiers.

They all turn to see the massive figure that is covered by dust but then when the dust clears up they can see it is Red Heart but something was wrong as he is more beast than a god.

Red Heart let's out a demonic and monster roar that shook the ground. Hie eyes was completely red and after he roar he looks at the soldiers and then begins to attack at them. He was blinde to his rage as he goes all in and massacres anything he sees.

Screams is heard as the soldiers were getting slaughtered within seconds. He continues killing them when he was shot by a tank.

Red Heart slowly turn back to the tank that stood there and then the tank fires but Red Heart caught the cannons shell and then crush it.

He then charge over and then cut the tank in half which the tank blows up. Flames surround Red Heart as he then let's out another roar as he yells into the air and then he continues slaughtering anything and anyone he sees as he loses control and goes on a brutal rampage.

To be continued.................................................