After Issei defeated Diodora and save Asia the Gremory group we're planning to leave not before Asia wanted to offer a prayer before they left. When Asia was making her prayer she was then suddenly engulfed in ray of light until she was nowhere to be seen. A man appear from a lime green magic circle it was the descendent of the Great Devil Beelzebub, Shalba Beelzebub.
Diodora notice Shalba he ask for help but Shalba killed Diodora for calling the true bloodline old and he didn't take that lightly. Shalba reveal to the Gremory group he was the one who sent Asia away. Everyone all look at Issei he was in an emotional state trying to find Asia and they all felt bad for him.
Issei: Let's go home, Asia. We're doing the three legged race in the sports festival. We need to practice.
Everyone all shed tears for the disappearance of Asia. They don't want to believe Asia is truly gone. Xenovia charges at Shalba and using her two swords trying to land a hit on him. But Shalba block her attacks using his magic circle to defend himself and launch Xenovia to the ground.
Shalba: It's useless.
Xenovia: Give Asia back! She's my friend! She was so kind! She was gentler then anyone!
Issei: Rias, Asia isn't here. We here to find her quickly. She's treasured family!
Rias: Issei...
Shalba: Truly, the princess of the Gremory household has bad taste. You, filth. And you, too, masked nobody. I sent that far beyond the Dimensional gap. Surely her body has expired by now. In other words, she's dead.
Kumoko: Hey asshole!
Shalba quickly defend himself using a magic circle from the surprise attack. Shalba look around the room searching for the person who was trying to attack him. But he could've swear he saw something white but not the person who attacked him.
Shalba: Who's there?! Who dares to attack m-
Rimuru:
I sent a powerful punch at Shalba sending him through the wall. He crash land outside the castle laying down on the ground.
Rimuru: (Seems like we made it here in time, It's too bad I didn't deal with Diodora the Explorer and I was planning on making some jokes about him but oh well.)
Kumoko: Are you guys all right?
Rias: Ye-Yes we are but Asia.
I was going to tell them about Asia until I notice Issei was very quiet my sister also noticed this as well. The Boosted Gear appeared from Issei arm and he seems like it's about to happen, but my sister put on a barrier around Issei to contain him.
Rimuru: (Hey Ddraig can you hear me?)
Ddraig: (Yeah I hear you.)
Rimuru: (Good, listen you think you can keep Issei anger under control when he goes to Juggernaut Drive?)
Ddraig: (I'll try my best to control his anger, but that will only increase his anger more.)
Rias: Why did you put a barrier around Issei?
Rimuru: He's about to go Juggernaut Drive, we'll be dealing with Shalba and After that we'll help out Issei. You have my word on that Rias.
Rias and the others are surprise Issei is about to go Juggernaut Drive. They were worried about Issei going out of control but they can count on me and my sister to help him. Shalba finally woke up and he try to remember what happened, he only remember he got punch by someone with blue silver hair. He then look at two people one with blue silver hair and and the other silver white hair. They we're walking towards him and Shalba seem to recognize the one with blue silver hair somewhere before.
Rimuru: Hey there sleepyhead. Did you have a nice nap?
Shalba: Were you the one who punch me
Rimuru: And what if I am.
Shalba: I will kill you for assaulting me! You have made a foolish mistake for attacking the descendent of Beel-
I didn't let him finish his sentence I use thought acceleration and start beating the shit out of him.
I stop my punches and I let my sister have a turn beating the crap on Shalba.
Shalba: Bastard! I'll kill-
Rimuru: Nice hit sis.
Kumoko: Thanks, that bastard deserved that for trying to kill Asia.
Shalba slowly got up, still feeling the pain from the beating he got. My sister use her webs wrapping around Shalba and throwing him to the ground.
We both look down on Shalba he looks pissed at us.
I then got an idea how to get him more pissed, I whisper to my sister ear about my idea and she had a wicked smile.
Shalba: What are you smiling about!? You fools think this can stop m-
Rimuru: Sorry we couldn't hear you we're just having too much fun beating the crap out of you.
Shalba: Enough!!! Do you not know who I am! Once I get out of this I'm going to-
Kumoko: Shut up no one gives a damn about you and it will soon be your end. You have pissed off someone by getting rid of the person important to him and that's why you will die.
We felt a powerful aura coming from the castle. There was an explosion and we saw Issei in Juggernaut Drive we then the heard that voice that sounds like Ddraig.
Issei: I shall drown you in depths of crimson purgatory. Juggernaut Drive!!!
Back to the battlefield
The Tempest forces got rid of all the Old Satan Faction army who were hiding in the battlefield. The Faction Leaders were impress by the military power of Tempest and it's forces. Sirzechs and Azazel had their conversation with Ophis like in the anime but the difference is Azazel still feels pain to his balls thanks to Rimuru. Everyone all saw explosion and felt an aura to where Rias, her peerage, Rimuru and Kumoko are at.
Tiamat: This aura, don't tell me that boy went to Juggernaut Drive.
Ragna: What the hell was that? What was that explosion and that aura?
Colopl: Did you cost explosion Ruby?
Ruby: Don't look at me I'm not the one responsible for that. I was by your side the whole time dummy.
Rin: Just what was that?
Tiamat: No time to explain we must head to that location at once.
Back to the others
Rias and the ORC members look at Issei who had a dangerous glare at Shalba with hatred in his eyes. His teeth whitened, his claws sharp, ready to pounce to his prey in any moment. I then decided to hand over Shalba to Issei as a peace offering letting him be the one to finish him off.
Rimuru: Here Issei he's all yours.
I throw Shalba to Issei in his Juggernaut Drive form and who is ready to attack Shalba. Shalba broke free from the web and removing the web from his mouth.
Shalba: I am not afraid of you! After I'm done with you I'll be dealing with those two imbeciles. Face my light of judgment! Try and take it on!
He try summoning a magic circle but nothing seems to happen he try again and it was the same. Shalba was wondering what was happening to his magic why couldn't he cast a spell.
Shalba: What is happening to my magic?
Rimuru: Was this you're doing sis?
Kumoko: I may have put a curse on him that he cannot use magic anymore using Curse Casting on Shalba.
Issei roar at Shalba he was growing impatient he went ahead and charged at him.
Shalba: No stay back you beast! Why can't I cast a magic circle?! NO NO STAY-
Issei took a bite on Shalba and tore his arm off. Shalba fall to the ground in pain from losing his arm. It was then Issei bit off Shalba head killing and leaving him headless. Issei let out a massive roar to the sky letting everyone in the Underworld hear him.
Rias: Is Issei still there? Can he finally change back?
Akeno: I'm not sure Rias.
Rimuru: Well I guess that's over, good thing he didn't use Divine Dividing or else his life force could have been in danger.
Kumoko: Yeah but I think this isn't over yet.
Issei turn his attention at us in charge towards to attack us. We both easily dodge his assault, he then fire a red energy beam and us. We quickly dodge the attack and the blast went to a mountain where it exploded to pieces.
Rimuru: Sis use your threads to subdue him I'll help him getting out of
Kumoko: You got it big bro.
Everyone all showed up seeing Issei in Juggernaut Drive. Vali, Bikou and Arthur Pendragon the descendants of King Arthur also arrive with Asia unconscious body which surprise the ORC seeing Asia is alive. Seeing everyone are here I send a thought link to my subordinates ordering them not to attack Issei. I then order Rin to use his chains helping my sister to subdue Issei in place. Issei was now wraparound with my sister threats and Rin chains.
Rias: I hope he can calm him down Issei. Just please bring Issei back to me.
Rimuru: Already Issei I need you to calm down and let me help you.
He just roared at me then he started to boost.
BOOST, BOOST, BOOST, BOOST, BOOST, BOOST!
He has boosted his power and try to break free from the threads and chains but sister threats stronger she was having a difficult time at all. Rin chains are strong but they won't hold on for long. Issei fire energy beam that's coming towards me.
I simply just walk towards the attack not using Void God Azathoth this time and just let the attack hit me directly.
When the attack collided with me it created explosion this made everyone worry at what happened to me even Tiamat was very worried as well. But then everyone felt a massive aura that was coming from where I collided it with Issei attack. Where the clouds of the explosion clears everyone can see I was fine and I was now where are you my true dragon outfit.
Issei in Juggernaut Drive kneel to his knees from my aura showing the different strength between us, that I am superior to him.
Rimuru: That is enough Issei, Shalba is dead now you don't have to go to a rampage. Your friends need you, Rias needs you, Asia needs you and she is alive.
He look where Asia who just woke up and see Issei in his new look.
Asia: Is-Issei is that you!
Issei: As-Asia?
Rimuru: (He seems like he's coming back to his senses. Already Ciel time to do your magic.)
Ciel: (I'm on it master.)
In a matter of seconds Issei change back tell normal Rias and the rest of ORC all rush to hug.
Rias and the ORC: Issei!
Issei: Guys!
Asia: Issei!
Issei: I'm happy you're alive I thought I was gonna lose you again.
Asia: I'm sorry I made you worry Issei but I'm happy to see you and everyone else.
Vali: Issei Hyoudou.
Issei: Vali you're also here?
Vali: Yeah just wanted to see how my rival is doing and there's another reason why I am here.
Everyone all look at the sky as a portal was open and a familiar annoying red dragon of dreams has arrive.
Vali: That's what I wanted to see.
They all look at Great Red they had the same conversation as the anime. While they have their talk Great Red seem to have notice me I then spoke to him using thought Communication.
Rimuru: (So how was your playmate with Trihexa.)
Great Red: (I don't want to talk about it! The things she did to me it is all in my mind and I'll never forget them.)
Rimuru: (I hope you learn your lesson Great Red for invading my dreams)
Great Red: (I learned my lesson just please don't bring her back.)
Rimuru: (Fine I won't bring her back. Just kidding. Well see ya Great Red.)
Everyone all thank me and my sister for saving Issei from his rampage. Tiamat came to hug me from behind and her breasts were on top of my head. This kind of reminds me how Shion used to do this to Rimuru, now I know how he feels and I love it.
Tiamat: Darling let's go home now to seeing our children. I'll make you some dinner when we get back home and after that I'll prepare you a special dessert while you enjoy in bed, if you know what I mean.
She whisper all that to my ear seductively. My body flinch, my face turn red, I really couldn't wait to get back home.
Rimuru: O-Okay let's go home now my love.
I was about to teleport our subordinates back to the Labyrinth but my sister is having a conversation with Vali.
Kumoko: Hello Vali it's been a while.
Vali: Hello Spider Goddess I hope you haven't forgotten the deal you promise me.
Kumoko: Don't worry I haven't forgotten our deal I just needed to ask my brothers assistance and he agree to help out. Just wait about two days and I'll bring that person I promise to you.
Vali: Fine I'll wait for two days it's not a problem. And you said your brother will be helping you is he happened to be Rimuru Tempest.
Kumoko: Yes he is my older brother he is stronger than me and you will probably won't stand a chance against him.
Vali: I see. Rimuru Tempest remember this day I will one day defeat you and prove that I am stronger than you.
Rimuru: I would like to see you try. But even if you train a lot you will still won't beat me. Good luck on your training to get stronger Vali.
Vali just smile and he teleported away I was about to do the same but then there was something I wanted to tell the Faction leaders.
Rimuru: Oh yeah there's something I have forgot to tell you guys. I am going to be having a meeting and I wanted the Faction leaders to come to this meeting.
Sirzechs: What is this meeting of yours about.
Rimuru: Well there are things that I want to discuss about you guys and this meaning I'm having is something I like to call it, the Walpurgis Banquet.
Next part Octagram