On the second day that they arrived, Kisuke was able to set all the essential diagnostic tools. And a few hours later, Sona woke up.
However, when Kisuke came to her to explain the situation, Sona is a lot weaker than he thought so before he explained anything, she became the first patient that Kisuke would diagnose.
Sona is, of course, confused with all that's happening and her memories of the night when she discussing with Kisuke regarding his terms and conditions are blurry at best. But she still followed Kisuke's instructions and trusted herself to him.
Kisuke spent a few hours to check everything and still couldn't find the cause of her too much weakness. He then remembered Aika and Koneko feeling heavy ever since arriving in this world and called both of them to get examined.
Spending another few hours, Kisuke finally got a clue on what's going on, but he still isn't sure about his findings so he spent the whole day of the third day they arrived to examine everyone including himself. And at night after sorting all of his data, he reached in a conclusion, "The world itself is rejecting us..."
Yoruichi stopped eating her dinner and furrowed her brows, "What do mean? Something as grand as a world is rejecting us?"
Others also stopped eating their dinner to listen to Kisuke, "I didn't notice it at first but it seems the world is slowly pressuring us, the invaders."
"What exactly is happening?" Sona asked. She already heard what happened and profusely apologized to both Kisuke and Yoruichi for dragging them to her problem and almost getting killed. It took them some time to explain that both Kisuke and Yoruichi were the ones targeted in the first place and they should be the ones apologizing to her. Sona then promised that once they return, she would spare no effort in clearing their names, even if it means leaving the House of Sitri. Kisuke and Yoruichi could only sigh at this overly serious, but adorable glasses girl.
"I'm not exactly sure what's happening but it seems that the Mana, Ki, and Spiritual energy of this world are slowly pressuring, not just Koneko, Aika, and Sona, but all of us. Although the rest of us can't feel it now since is strong enough to naturally resist it, it won't be too long until notice it." Kisuke continued explaining.
"What will happen if this goes on, nya?" Kuroka asked seriously.
"The best-case scenario, if we don't do something, is the world will eventually stop rejecting us if we stay long enough. At worst, starting from the weakest of us, we'll slowly die one by one."
"Then we should return as soon as possible..." Aika spoke.
"We will return, but it isn't easy as just splitting the space and go through it. First is we need to find an anchor to our previous world to ascertain its coordinates. Without doing that, we may end up in a completely different alien world, and at worse, we'll be stuck in between dimensions and that would be a death sentence. And another thing is to create a stable path to our world and that would take an enormous amount of energy that we might need months or years to gather."
"So in other words, we might have to stay here for a few years..." Sona muttered.
"Correct. But you don't have to worry about the 'Rejection' for now as I could set a sanctuary for all of us around this place to neutralize the pressure from the atmosphere.
"However, it's only a temporary solution and we'll need to let the world consider us as its inhabitants to solve this problem completely."
Yoruichi started tapping the table in contemplation, "And your plan is?" Since earlier, she wanted to ask Kisuke why are they not rejected in the previous world but hold herself back as they have a tacit understanding that won't talk about their own world with others around.
Kisuke looked at everyone first before speaking, "We'll move the schedule ahead of time. After I set the neutralizing barrier tomorrow, I'll leave for the city and try to gather information." 'The previous time we're transferred, the world didn't reject us and that's probably because we're born in that world with physical bodies. And because of that, the world didn't treat us as something foreign. In other words, I have to find a way to integrate ourselves into this world.'
"How long will you take?" Yoruichi asked.
"Minimum of one day and a maximum of three days. If I don't return by day five, follow the trails that I'll leave. If there is an emergency, I'll use the communication token to contact you."
"What's wrong with telepathy or communication token?" Koneko asked.
"We can use those, but we shouldn't. We still don't know if someone can intercept our communication through that. Even if that someone might not be able to understand any words we say, it'll still raise suspicion. And being tracked now would be fatal for us."
"Then we should rest early today. Everyone, finish your dinner and let's all go to bath~." Yoruichi suddenly suggested.
"W-what are you saying!?" Sona instantly reacted and blushed to her words, "We're going together!? T-that's shameless!"
"Ehem... Yoruichi-san, Sona-chan is here, so it might be awkward for her. So not today..." Kisuke tried to give Sona a follow-up.
But once she heard it, Sona's demeanor became cold and she stared at Kisuke with cold eyes, "Not today? So this isn't the first time?"
Noticing his slip of the tongue, Kisuke sweated and looked towards the rest to ask for assistance.
However, he should have known that no one in this room would help him. Rather, they'll do their best to let him suffer, "Oh~. We should totally go take a bath together~. That way, you could also check on my and Koneko's growth~." Aika grinned and said.
"...Kisuke?" Sona's eyes became colder.
Raising his hand in front of him, Kisuke tried to explain, "Wait! It's true that we always take a bath together. But it's already an everyday occurrence and you shouldn't get angry at something we normally do!"
'That's not an explanation!' Everyone aside from Sona thought.
Sona, on the other hand, stared at Kisuke for a while before pouting, "You should have invited me back then..." She muttered.
'You would probably try to trash me if I really invited to take a bath with me.' Kisuke thought, but he sighed in relief after Sona calmed down a bit.
Those who are watching are disappointed that Sona didn't press further. However, Koneko suddenly got an idea, "Kuroka-neesama, Kisuke-senpai disappeared for more than two weeks and he's going away again tomorrow, so you should ask him to satisfy you again today."
"Shirone!?" Kuroka stood up and tried to cover her mouth but she's already done speaking.
"Satisfy you?" Sona confusedly asked.
Seeing this chance, Aika pours more fuel, "Because Kisuke molested Kuroka-san too much, she can't be satisfied anymore without Kisuke's touch. As atonement for what the irreversible thing he has done, Kisuke would periodically satisfy Kuroka-san. And when I say 'satisfy', I meant sexually~."
"Aika!?" It's Kuroka's turn to blush from embarrassment.