Before Issei could further ask, Ravel suddenly stood up and declared, "Girls' meeting! Now!"
Slightly taken aback, Issei asked, "W-what's going on?"
"You heard her. Girls' meeting." Kisuke replied with an amused smile and turned to Rossweisse who'd already stood up and was about to follow the others, "But you're not going, Rossweisse-san. We have something pretty urgent to discuss."
Rossweisse frowned and pouted but sat back down as she watched the other girls teleport away, presumably, back to the Underworld where Rias is, "Urgent you say. I hope it's more urgent than this case."
Kisuke took out a stack of documents and passed it to Rossweisse, "You can decide that for yourself."
Curiously taking a look, it wasn't long before Rossweisse went into deep concentration as she browsed through the documents in earnest.
Meanwhile, Issei thought about the situation and asked Kisuke which caused Rossweisse to raise her head up, "You sent them away on purpose?"
"Of course not~" Kisuke immediately denied it, "It's all just a coincidence, albeit, a convenient one."
Issei could only sigh at Kisuke's answer and thought that it was definitely on purpose, "You could have just sent them away normally."
"Don't get it wrong. The concern I presented to them is a legitimate issue that couldn't be ignored. Else, they wouldn't be calling for this 'girls' meeting'."
Rossweisse placed down the documents and nodded in agreement, "That's correct. It's a very concerning issue."
Issei wanted to ask what it was about but Kisuke stopped him by saying, "Let them worry about it."
Having heard that, Issei could only sigh as he guessed what Kisuke told them.
Ignoring him, Kisuke turned back to Rossweisse and asked her what she thought about the documents he'd passed her.
Rossweisse stayed silent for a moment before actually answering, "To my understanding, it's a modified blueprint for the Isolation Barrier. I don't know how you got ahold of it, but you removed the portion that uses the Rating Game technology and inverted its strength to be stronger against outside interference than the inside. At this point, I'd rather call it an Exclusion Barrier."
Kisuke nodded, "That's correct. Its main use is for protection against outside threats."
Rossweisse crossed her arms and started tapping her arm, "But I don't understand. Although some components are missing, it's obvious that you're purposely hiding those to prevent me from deciphering them. Aside from the strange part where you added a 'core' as a power source which isn't really needed, I don't understand why you wanted to show me this. I think you're fully capable of building this on your own."
"That's the problem." Kisuke sighed, "I need to complete this within a week."
"Problem? What problem?"
"I have to expand this 109,980 times than its original size."
Rossweisse went silent for a moment, "...Huh?"
Kisuke continued sighing, "I only have a week to finish this whole project. I can do it on my own, but there's other work that I have to finish that's also just as important."
Rossweisse couldn't take it anymore and slammed the table, "Huh!? What are you talking about!? 109,980 times!? Are you insane!?"
Issei was taken aback because it's not often that he could see Rossweisse absolutely lose it.
"That's enough to encircle the whole globe multiple times! And just how are you going to provide power for this enormous thing!? Because I know that the residual Magic Power that the Dimensional Gap is emitting wouldn't be even close to enough! In the first place, what are you going to use this for? Do you plan to trap the entire Earth!? For what!?"
Meanwhile, Kisuke was also a bit surprised, but not because of her outcry, 'She's pretty good. She was able to instantly calculate the scale and what was needed. Looks like I'm going to have it easier.'
Kisuke was about to answer her concerns but Issei's phone suddenly started ringing. Issei wanted to turn it off but Kisuke stopped him, "Pick it up. It'll probably explain why I'm doing this."
Issei looked at him for a moment before picking up, "Hello? Rias? Is there a problem?"
[The Gods of Hell Escort Team was attacked by unknown mechanical lifeforms. There are only two enemies but Vali, Cao Cao, Bikou, and Heracles were injured in the exchange.]
Issei and Rossweisse's eyes instantly widened in shock as Rias continued, [Angra Mainyu was also snatched away. But thanks to Riveria-san being able to see through the unique Teleportation Magic, they were able to prevent any further kidnappings and these unknown enemies retreated silently.]
"Is everyone alright?"
[Their wounds are being treated but there's nothing concerning aside from specialists hounding them to study the traces of the attack.]
"Understood. I'll call you back later. Be careful."
[You too. And Kisuke Urahara. I know you're listening. Don't ask anything unreasonable from my Issei and sister Rossweisse.]
"It'll be tiring but not unreasonable~", replied Kisuke with a chuckle.
A few seconds later, Issei dropped the call and turned to Kisuke, "If I understood it right, you want to keep these enemies out of Earth?"
Kisuke nodded, "I want to buy at least a few years since none of us are actually prepared for their arrival."
Rossweisse dropped her previous questions and now understood how urgent this issue is, "I presume you also wanted to put a barrier on the Dimensional Gap? But wouldn't that be enough? Why do you need a barrier on the whole Earth too?"
Kisuke pointed up and said, "Because they are already out there in the vast space."
"How did you... Wait. Are you the one providing this anonymous information about Evie's!?" Issei exclaimed.
Rossweisse, on the other hand, thought more about Kisuke's words, "If they can stay up there without any problem, chances are they also have the technology to bypass the Dimensional Gap now that they know our exact location in the universe?"
"That's just my guess, but I already saw their ship. They are technically the aliens that you'd see in Hollywood films."
Now Rossweisse could see the problem and what Kisuke wanted to achieve, it only leaves the final two questions, "Why in one week? Are they going to attack within a week? And what core are you going to use? Frankly speaking, I can't imagine anything is enough other than at least tens if not hundreds of God-level beings supplying it with power 24/7, and I doubt you have that much sway."
"No large-scale attacks will happen as far as I know, and only a week because that's the only realistic timeframe I could deliver before the 'core' appears. I could delay it, but any minute or hours the 'core' is left out in the open, the chances of idiots stealing it would rise up. In other words, I'm timing the completion of this project with the delivery of the 'core' so that the bad actors can't do anything."