(Intro)

https://youtu.be/sME8zEufcOQ

Currently, we now see Y/N, Rias, and Akeno walking arriving at the forest and were prepared to face off the other fallen angels who were on guard.

Y/N: Oh, there's one right over there.

Rias and Akeno look up where Y/N was pointing and they were looking at a girl with short blonde hair and she was wearing... a cosplay dress who was standing on a tree???

?????: Look who's here.

The girl then jumps off the tree and lands on her feet.

Mittelt: People call me the fallen angel, Mittelt!

Akeno: Ara ara~. How courteous of you. 

Rias: My servant sensed you. You must be scared of us being on the move.

Mittelt: Not at all. It's just that we don't want demons interrupting our important ritual. And more importantly... *looks at Y/N* That guy behind you... He's Blade, isn't he? Raynare told us everything about him, and Kalawarner said that another named Garren confronted her the last time and said that he wanted to kill all fallen angels. It will be trouble for us if Blade and Garren tried to get in our way and ruin our plans.

Y/N: Me and Garren giving you trouble? Like you're one to talk. You're fallen angels are the ones causing trouble around town. I'm only here to help my friend and put a stop to you and your friends.

Akeno: Oh, I'm so sorry. Our cheerful kids just went there.

Mittelt: Wait, really?! Are you serious?!

Akeno: Yes! Boldly through the front gate.

Mittelt: Damn it! I figured you'd be sneaking in from the back! Well, how many lackeys you bring doesn't really matter anyway.  It won't be a problem. *looks back* After all, you three are the only ones who actually stand a chance of interrupting us. Thanks for coming all the way out here

Rias: It doesn't matter. We're not going to join them. Oh, you're abandoning them? Well, anyway, you know, if I defeat you, their master, the servants will be nothing. Come forth, Kalawarner, Dohnaseek!

A purple magic circle appeared behind Y/N, Rias, and Akeno. Coming out of the magic circle were Kalawarner and another fallen angel named Dohnaseek appeared from the magic circle.

Dohnaseek: Unfortunately, we meet again, Lady Gremory.

 Kalawarner: We need to pay back your servants. 

Akeno: Ara ara~. You're both here~.

Dohnaseek looks at Y/N.

Dohnaseek: Oh? So you're Blade, huh? Raynare told us so much about you and your Sacred Gear.

Kalawarner: That young man is Blade? Heh. Don't make me laugh. Why would God choose a weakling like you to become Blade? It doesn't make any sense.

Y/N: *pissed* You fallen angels are starting to piss me off... Why don't you fight me and find out?

Kalawarner: Ohohoho. You're asking for it, you bastard. There's no way you three will stand a chance against us.

????: How about the four of us?

They were all confused about where the voice was coming from. They turn around and looked to see where the voice was coming from and they see a man with messy hair and red eyes slowly walking towards them with a cold expression on his face.

Mittelt: Huh? Who are you, you bastard?

Y/N: E-Eh? Who are you?

Akeno: Wait... Aren't you from our class who was sitting behind Rias?

The man looks at Rias and Akeno.

Rias: You're... Tachibana-kun, right? Toshiaki Tachibana-kun from our class, Class 3-A?

Toshiaki: That's right. I don't really talk much anyone at school, but I'm glad you two remembered me, Rias-san, Himejima-san. 

Rias: W-What are you doing here, Tachibana-kun?

Toshiaki: Me? *looks at the fallen angels* I'm here... to kill all of these fallen angels.

Kalawarner: W-What...?!

Y/N: Eh?!

Rias: W-What are you saying, Tachibana-kun?! And how do you know what the fallen angels are?! 

Toshiaki: That doesn't matter.

Rias: It DOES matter! A-Anyway, please leave and get out of here.

Akeno: That's right, Toshiaki-kun. You have no idea what you are dealing with here.

Toshiaki: Yeah, I know that... That's why I'm going to kill every single fallen angel out there... until there is nothing left of them.

Akeno: Toshiaki-kun...

Kalawarner: You fool... Just who do you think you are?!

Toshiaki: The man who will put an end to all of you... and this place will be your grave. I'll make you fallen angels pay after what you did to my mother.

Y/N: Your mother...?

Dohnaseek: Huh? What the hell are you saying?

Rias: What are you trying to do, Tachibana-kun?!

Toshiaki: ...

Toshiaki stayed silent and slowly pulls out... his Garren Buckle.

Y/N: No way... That belt...

Rias: Tachibana-kun... Don't tell me you're...!

Toshiaki pulls out his diamond ace card, inserts it in his Garren Buckle, and as the buckle starts flying around him, it attache around his waist.

Toshiaki moves his left arm to the right, he clenches his fist, and then...

Toshiaki: ... Henshin!

Toshiaki pulls the lever on his buckle as the belt flips over and reveals a diamond logo on his belt.

TURN UP!

A blue giant energy panel with an element of the stag appeared coming out from Toshiaki's belt. The energy panel slowly went through Toshiaki and transforms into... Kamen Rider Garren.

https://youtu.be/KBdG1X2uW9E

Dohnaseek: It can't be... Garren?!

Kalawarner: Y-You bastard! You're Garren?!

Akeno: Ara ara~. I'm really surprised Toshiaki-kun from our class is Garren all along~.

Rias: I... I don't believe it... Tachibana-kun is Garren...?

Garren: I am Garren... Kamen Rider Garren.

Y/N: Whoa, that's awesome! And he used the name of the Kamen Rider, too! Talk about lucky! All right! I'm going to transform, too!

Y/N pulls out his Blay Buckle, inserts his spade ace card in the buckle, and attaches it around his waist.

Y/N moves his right arm to the left and then he changes his hand position.

Y/N: Henshin!

Y/N pulls the lever on his buckle.

TURN UP!

https://youtu.be/aWnk-yS_5W0

Blade: Ore... sanjou! Blade version! 

Rias/Akeno: *looks at Y/N confused* "Ore Sanjou"...?

(A/N: Wrong Kamen Rider, dude!!!)

Mittelt: W-What the hell is going on...?!

Dohnaseek: Not only Blade, but Garren is here, too!

Kalawarner: This is bad...

Garren looks at Blade.

Garren: Hey, kid. So you're really Blade, huh? I've seen you on TV sometimes. But I didn't expect for Blade to be a high schooler from my school.

Blade: And I didn't expect Garren to be a student from a school where I study and is a classmate of Rias-senpai and Himejima-senpai.

Garren: You're not so bad, kid. Do you think you can keep up with your senpai?

Blade: You bet I can. You don't have to ask.

Garren: ... Hmph. Just don't get in my way.

Blade: You got it.

Rias: Kenzaki-kun...Tachibana-kun...

Dohnaseek: It's obvious you intended to interfere with our plan.

Kalawarner: Repent your life!

Rias: *looks at Akeno* Akeno?

Akeno: *smiles* Of course, President.

Akeno raises her left hand up and dark clouds were gathering around above Akeno and a large bolt of yellow lightning crashes down towards her and then Akeno changes her form.

Blade: Whoa, that's awesome. 

Mittelt: What?! Are you trying to pull me into a cosplay show?!

Akeno: *giggles* ...

Akeno raises both of her hands up as magic circles started to appear around and then she sets up a magic barrier.

Dohnaseek: A barrier?

Mittelt: Isn't this pretty bad?

Akeno: *giggle* You can't get out of this cage, I'm afraid.

Kalawarner: So this was your plan all along!

Akeno: Of course~. We came here to get rid of all of you~. My sincerest apologies~.

Mittelt: You think we're birds?!

Rias: You'll just vanish. *looks at Garren* Tachibana-san, Issei told me before that you wanted to kill all fallen angels when you are Garren, right? Would you like to do the honors?

Garren: *looks at Rias* Leave it to me, Rias-san. I wanted to kill them so badly after a long time...

Rias: I'm counting on you.

Kalawarner: Enjoy posing. 

Dohnaseek: Once the ritual is over, even you won't be able to stand in her way.

Blade: We'll see about that! I believe in Issei! I know he'll save Asia-chan for sure!

(Inside the Church)

(Issei)

Currently, we now see Issei, Kiba, and Koneko fighting against Freed and Issei dashing towards Freed for a punch.

Issei: Promotion!

Inner Issei: A rook is a chariot. It possesses ridiculously defensive ability...

Freed: Eh? For real?

Inner Issei: ... and a monstrous attack power!

As Freed was just standing where he was at without doing anything, Issei got close to him and sends a strong punch at Freed's face.

Freed: It hurts!!!

After that punch, it made Freed go flying all the way across on the other side of the church.

Issei: You've done terrible things to Asia! Now I feel a little bit better!

Freed gets up.

Freed: Stop... Stop fucking with me, twat!

Freed summons his two light swords and jumps into the air but Koneko grabs the furniture and throws it to Freed.

Freed: Ow!!!

The furniture hit Freed and he crashes on the wall and falls down. Kiba dash towards Freed for an encounter attack with his sword, but Freed dodged Kiba's attack and then tries to runs away.

Freed: I don't want to be killed by a demon! So, farewell!

Freed throws a light flashbang to the ground and then he disappears.

Issei: He ran off!

Kiba: Anyway, let's go.

Koneko: There.

Koneko punches the furniture out of the way and found a passageway to the underground of the church. Issei, Kiba, and Koneko quickly went downstairs to the underground and after they have arrived at the underground, they quickly open the door and sees Raynare performing a ritual on Asia.

Raynare: Welcome, demons. You are quite late.

Issei was shocked and saw Asia getting hanged on the cross.

Issei: Asia!

Asia wakes up as she slowly opens her eyes and saw Issei along with Kiba and Koneko.

Asia: Issei-san...? 

Issei: Asia! I'm coming now! 

Kiba: Hyoudou-kun, watch out!

Kiba tried to stop Issei from going after Asia but it was too late when the light-lance strikes down in front of Issei sending him flying to the wall.

Issei: Sorry to ruin the dramatic reunion, but the ritual is almost over.

Asia: AHHHHH!!!

Issei: What are you trying to do to Asia?!

Kiba: I see. That fallen angel's objective... was to take her Sacred Gear.

(Outside)

(Blade)

Rias: I see, so the fallen angel intends to take the nun's Sacred Gear.

Blade: *looks at Rias* What does that mean?!

(Underground Church)

(Issei)

Issei: Take her Sacred Gear?! What will happen to Asia?!

Kiba: That's... 

 (Outside)

(Blade)

Rias: If the fallen angel takes away the nun's Sacred Gear, then her life will be...

Blade: No, it can't be... Are you saying...?

(Underground Church)

(Issei)

Inner Issei: Asia is going to die...?

Asia's Sacred Gear got removed from her body and then it lands on Raynare's hands.

Raynare: Your Twilight Healing... is finally in my grasp. 

 (Outside)

(Blade)

Blade: No... This can't be... Asia-chan...

To be continued

(Outro)

https://youtu.be/CebPvjuvY80