Kaito was visibly surprised on reading those words .
'A WI5 brain stimulant ?'
'But the latest invented by research center is just WI4'
'Does that mean ….?'
Kaito's thoughts started running wild . When the system told him that it contains potions from all over the universe it meant all the galaxies and the planets within them . It also implies two things .
First , Kaito's potion inventory contains items which aren't discovered yet
Second , there are more living beings outside of the planet they are staying at
The first point was beneficial for Kaito but the second point was dangerous . If the combat power of the species outside of the planet is more stronger than Z-Rank than it was too dangerous . The most power held by a human is just X-Rank whereas those held by the demons is Z-Rank but it was also a possibility that the living beings outside has reached a realm where no one from this planet reached .
Kaito was always someone who found it strange . No one knows the origin of the demon race and the reason they invaded the continent . If there were other creatures outside here than it can also mean that the demons were also one of the living beings who lived in the universe for many years .
It was possible that there were demons who were far stronger than Shinjun on that planet but due to famine , war or internal conflict that planet was destroyed and the remaining ones used dimensional rifts to cross over to this world in search for a place to live .
They discovered that this world didn't contain mana and thus thought that it was an abandoned planet . They descended here but surprisinly found that this planet was captured by humanity . Thus , they started slaughtering them with the intention of complete annihilation .
As time passed , they discovered that humans were much more desperate for survival and they absorbed the mana brought by demons and thus forming the 'First Awakened' .
If these facts were true than the fight wouldn't end just by killing the demons . The other races might invade too and the possibility of them being hostile was high .
[Congratulations , you have gained an understanding of the 'Onix Universe']
[You are one step closer to realising the complete truth about the universe]
[As a reward , you have gained 'Skill : Insight (SS)']
'A system reward ?'
'And what does it mean by 'gained understanding' ?'
'It also mentions truth about Onix Universe'
'This is something very important'
'But , I can't discuss it with anyone'
'Even if I did , there was no guarantee others will believe it'
'I have to keep it a secret and have to watch how things unfold'
*****
Kaito went to class next day but he couldn't pay attention to the classes . The program for S-Class students to take part in missions issued by the Academy will start after the Student Council Election which means there is still a month left before it starts .
The others watched Kaito's expressions since morning . He had hardly talked since morning and they were worried that Kaito got into some trouble which he didn't want to talk about . During the lunch break , the others caught him .
"Kaito , what's the matter with you ?" asked Kendo
"H-Huh !?"
"You have not talked since morning . Are you in some trouble ?" asked Akane
"N-No , No . It was just that I haven't felt well since morning after waking up"
"Are you okay ?" asked Seina with a worried face
"Yeah , I'm fine"
Kaito brushed off the topic but they didn't gain clarity in his words . After the lunch break , they all went to the floor of the 3rd year students . They needed to find Akari . Fortunately , they found her entering her classroom along with Yuuki . They called out for them and caught their attention .
Akari and Yuuki were both surprised and confused upon seeing them . They went towards them and stood in front . Their faces were tensed . Akari and Yuuki immediately understood that something was wrong .
"Akari-senpai , do you have some time ?" asked Akane
"Sis , you too" said Kaori
They both replied with a nod as they too were surprised . All left the classroom and headed towards the roof . It was a place where many students visit for various reasons . Some to discuss secrets , some to confess their love while others just to hang out .
They reached the roof as Akari and Yuuki stood by the railing . Wind was blowing their hairs and uniforms as they looked at others .
*****
They heard all the details . Akari and Yuuki were surprised too . They both knew Kaito wasn't a type to stay quiet for a long time . Although his intellect and strength surpassed all of them but he still had the habit of talking . It was a long time habit which he couldn't change . Anyways , the conversation continued between them for quite some time as Akari's face also turned to one with worry . Yuuki just held her chin with her hands and was lost in thought .
After some time of thinking and confirming some more details they told that they will look into the matter as quickly as possible . Akari had only one thought 'Kaito was hiding something' .
She knows her brother all too well and she also knows that if Kaito didn't have anything to hide or anything which is outside of his understanding then only Kaito stops talking or yapping . Akari decided to confront Kaito head-on . She needed to know what was going on inside the head of her brother .
****
That night , Akari and Yuuki came and knocked on Kaito's door . He was cultivating his mana inside as he heard the knock . He didn't move rather he raised his left hand towards the door and opened the door knob with his control skill . Akari and Yuuki were visibly surprised as they saw Kaito was still sitting on the bed in a meditative state .
The mana excluding his body made them realise that Kaito's mana was on a different level compared to the both of them . His mana was more than 700,000 points which was realised by both of them . They didn't disturb him as they sat on one chair each in his room .
After about 10 minutes , Kaito opened his eyes as he let out a deep breath . His mana dissipated as his body was covered in sweat . He looked at the two figures sitting in his room and became a little awkward . Although , his sister wasn't a problem but sitting like this infront of Yuuki made him a little nervous .
Kaito told them to wait for 5 minutes as he quickly entered the washroom and took a bath . He came out with a new pair of clothes and a towel . He let it dry as he sat on the bed facing both . His expression was serious as the nervousness from few minutes ago completely vanished .
Akari was about to open her mouth as Kaito stopped her .
"I know why both of you came" said Kaito
"Then , answer us" said Akari
"I can but what I will say now is just my theory and thoughts"
"Okay , we understand" said Yuuki
"Thank you"
Kaito took out the file he took from the potion inventory and forwarded it towards the both of them . They were surprised a little as Akari took the tube . She read the words and asked with confusion.
"A brain stimulant ?"
"Correct"
"So , what do you want to tell us through this ?" asked Yuuki
"Don't you notice something unusual ? Notice it"
They looked over once more as surprised look was evident on their faces .
"This is …?"
"Correct . An WI5 brain stimulant"
"But , where did you get it ?"
"It's a secret which I can't say now but I will in the future"
"Anyways , from what I last heard . The latest brain stimulate was WI4 which is still in it's experimental process"
"Correct again but this is a WI5"
"What could this imply ?" asked Akari
"I think I have a theory about everything . I don't know how much will it prove to be true but it could explain everything from the start . It could also explain the reason demons attacked the continent"
Their eyes lit up a bit as they asked hurriedly .
"Say it" said Akari
Kaito explained everything he thought about last night . He also mentioned all the details even the minute ones but kept quite about the appearance of the system . They heard carefully before nodding . The theory Kaito provided could indeed improve the chances of finding the real reason behind the demons . It was like a hidden piece of information which wasn't found rather predicted .
"If what you say is true then the reason for the elimination of the demon race has increased" said Yuuki
"Good job , Kai"
"It's nothing to praise about . It was more like a timebomb ticking above our heads every moment to fall and crush us"
"But , even if its true . How will you describe the situation to the higher ups ?" asked Yuuki
"I won't and that is the reason why I decided to call you both for a detailed conversation"
"I guess letting the truth to be hidden for some time is important " said Akari
"We have to simply focus on being stronger for the time being" said Kaito
"Right . We need to atleast reach X-Rank within the next five years"
"Kai , don't discuss this matter with anyone"
"Okay and you keep it a secret too"
They left the room with a worrisome face more wrinkled than when they entered . Akari was feeling like her head was about to explode . She didn't possess intelligence like Kaito but her IQ was not much less than Kaito as they both share the same blood . Yuuki on the other hand possess intellect on par with Kaito . She didn't express her intelligence too much but her grey cells were much more active than it is displayed .
Kaito laid on the bed as he decided to set this theory aside . He needs to focus on getting stronger . His system made his growth much faster than others along with high efficiency . He looked at the brain stimulant on the table . Kaito couldn't help but gulp . He needs to expand his brain but this tube was already in a position where using the tube would be a great disaster . He decided to bring out another bottle of the stimulant .
Kaito drank the WI5 brain stimulant as his body felt unusually calm . His internals were fine too but Kaito felt this was the storm before a disaster . His suspicion turned reality as a pain in his chest made him fall down . The liquid was absorbed by his body . He could feel that his body is being modified from the external all the way to his genes .
Kaito's brain capacity increased more than it did last time he took the stimulant .
'Expensive things sure are useful'
'I could feel my senses getting better'
'I think its about time I focus more on developing some skills'
Kaito was thinking about how to improve his skills when suddenly a notification panel appeared before him .
[Your brain capacity has increased to a high level]
[You have unlocked part of your 'Mind Gate']
['Mind Gate' opening completed 32%]
'Haven't heard that notification in a long time'
'I heard it last time many months ago when I was still at S-Rank'
Kaito decided that he won't do any more training for today . His body needs ample amount of rest . Kiyoshi used to tell him that rest is also a part of training . He laid on the bed as he dozed off .