---(Sasuke's point)---
That boy has a Sharingan? Who is he? All questions Sasuke thought to himself.
"I have to tell naruto, About this boy. He is an Uchiha for sure but whose son is he? It's odd" Sasuke was confused.
Thinking about kai, Sasuke Had a thought, "what if...he's Itachi nii-san's son? No that wouldn't make sense, nii-san wouldn't have a son, so who is he. Could it be? it..it could be myself and sakura but we never had another baby unless.. no it can't be!!"
Slowly Sasuke started to think back, At the Hospital 12 years ago,
"Doctor, how is she and the baby?" Sasuke looked desperate, he didn't know she was pregnant. he felt the worst was going to happen. then the doctor said something that would stick forever with Sasuke. it was really hard for him to loosen up.
"I'm sorry Sasuke-san, for the loss of your son.." he said in a sorrowful tone
"W-what?" He said in disbelief he didn't cry he just sat there in utter shock they never told anyone. not even to Naruto or Sarada
"Oh god, how can it be? did the Doctor lie? my poor son. I had a son! Tears fell down Sasuke's face for the first time. after a long time, he cried.
Sasuke started to think, " If Kai knows about him and Sasuke, how would he react? does he already know? Why didn't he say anything?" Questions filled Sasuke's head.
Just then Kai heard something strange and he opens the door.
Sasuke quickly jumped and escaped out of Kai's Sight.
"I swear I felt something outside probably an animal or something. Man, Weird" Kai just went back inside changed and the time was 0:11 am.
"I should sleep, I got to show my skills to the Hokage and his advisor at 9:30 am I'm sure I'll only have nightmares, so there's really no point to it." Kai sets an alarm for 7 am and he went to sleep.
The Sun raised up, Sasuke who was unable to sleep, stood all night at Kai's Apartment terrace.
"It's 6 am were is naruto? I am really confused. Ha! how do I tell sakura about this, I can't just say 'oh hey remember our firstborn that died, well fun fact he's not actually dead but he's here alive but I didn't want to make assumptions then I felt his chakra", nah! Its really stupid of me to do.
Sasuke plans to tell naruto about this, so he runs to the Hokage's office, sensing Naruto's chakra.
"Naruto!!" Sasuke shouted, losing his cool.
"Sasuke?" Naruto says while yawning. Seeing that the Cool and calm Sasuke he knew, now completely shouting with confusion, naruto asked him to sit and breathe for a moment.
"Naruto!!! I gotta tell you something." Sasuke became some what free and started to tell everything to naruto.
"Kai has Sharingan!." I blurt out All at once.
Naruto became confused.
"W-what that impossible! I can't believe that. Who's son is he? is he actually an Uchiha?" naruto started to ask too many questions
Sasuke looked down. and slowly tears started to come out of his eyes.
seeing Sasuke like this, Naruto couldn't help but be totally confused.
"Hey! Sasuke! please tell me what's going on!!" Naruto asked slowly walking to Sasuke and patting Sasuke's shoulders.
Sasuke looked at Naruto with his tearful Sharingan eyes, and said, "He might be mine and sakura's. Please hear me out."
"What the!!" Naruto was immensely confused after what Sasuke just said.
Sasuke tells him everything. naruto's reaction slowly changes to serious, and he slowly walks and sits down on the Hokage's Chair.
"mm, I see. I'm not sure whether we can actually assume that, but we'll have to wait and see. I'll place him on a squad with Konohamaru, he'll have three genin, and he'll keep an eye on him." Naruto said.
"Right, thank you, Naruto, I say this while still feeling nervous because I feel terrible and stupid for not seeing my son". Sasuke said.
"haiya! Don't worry, he is your son you say, that means, he will have your capabilities. Do not worry! Okay!!" Naruto tries to calm Sasuke.
"I'm going to tell Sakura," Sasuke says.
"Okay, good luck, and don't tell Sarada that you don't want to get her Hope's up just for him not to be her brother." He expresses worry.
Sasuke nodded and left the Hokage's Office immediately.
After Reaching Home, Sasuke enters the Home a bit tense.
"Sasuke-Kun why did you call me here?" Sakura sounded a hint of interest in her voice.
"well um, how can I say this um..." Sasuke sounded hesitantly
"Say it Sasuke-Kun, it's alright, whatever it may be!" Sakura says
"Our son Might not be Dead!" He said in one breath
"W-what?" Sakura was shocked
"Kai is a 12-year-old boy. He has black hair, Dark-green eyes, and he had Sharingan. he even has a sword, I can't think of anyone else who could have had it. So, while explaining to Naruto, he stated that he will observe him determine if he possesses the Sharingan." Sasuke said to Sakura.
Sakura nearly moved into tears, and She really started to believe that kai is their son, that they thought he might be dead.
"Is it possible that I have a son? But where had he been all this time? How has he been doing? Oh my gosh, where is Sasuke now?" She inquired.
"Kakashi and other shinobi are assessing his abilities since Kai is known across the globe as the Long Red Swordsmen and is a strong fighter," Sasuke said.
"How can he be that strong? he is only 12, What has he gone through?" stutteringly, sakura inquired
"Quite a bit... and we were never there for him. I feel terrible as a father." Sasuke felt miserable.
"Anyway, We should probably wait. Until the results come from Naruto. Let's wait okay!!"
"Yeah!"
As they comforted each other by embracing themselves with each other.
---(At the Shinobi Assessing Grounds | Kai's Point)---
3 hours after 9:30 a.m. Kai greets Kakashi respectfully as he arrives at 12 p.m.
"Hello, my name is Kai."
"Ah yeah Kai, sorry for being late, I was lost on the path of life," Kakashi says as he meets him.
As we all know, Kakashi acted strangely, and Kai was unable to understand the sentence. As a result, he just repeated the words.
"Understandable. Shall we get started?" "Yes," Kakashi said.
"Can you show me your best ninjutsu?" Kakashi asked kai.
Kai Wanted to show him at least wanted to keep it to a jonin level or higher
Katon: Ao kakyū (Hell Blue fire)
He then blew a gigantic wall of Blue fire across the heat-resistant training area, scorching Mark's. Kakashi could feel the heat even from where he stood.
"Great. Is that a new jutsu?" Kakashi asked.
"Yes, It's self-developed!." He stated simply
"Fantastic, can you show me your genjutsu?" Kakashi asked.
Even before Kakashi could realise, Kai had already put him in a genjutsu when this started
"I'm sorry lord 6th but you're already in a genjutsu." He said
"Huh?" Kakashi was confused
He undid the genjutsu and Kakashi looked shocked the fire-resistant walls were burnt to the point of they may well be a chocolate bar at this point
"H-how?" Kakashi was shocked with a strumming smile on his face.
"I did it when I came in."Kai felt proud and said.
"Brilliant now let's have a battle of taijutsu."
"Right."
The duel began with Kakashi matching Kai, but Kakashi had no idea that Kai was immediately behind him, facing a clone.
"Chaaa!" is all it takes. And with that, Kai creates a crater in the earth, and as Kakashi passes him, he is completely taken aback. It was similar to viewing Sakura and Tsunade's superhuman abilities.
Kai's true identity and the incredible talents he held were revealed to Kakashi. He positively affirms that he is the son of Sasuke and Sakura, relying only on his skill to overpower and the calm demeanour that both of his parents possessed.
He then turns to him and inquires whether he has any Keke Genkai.
"I don't think so." He began attempting to demonstrate that he wasn't lying, even if he was.
"All good, and you're free to go; missions should be available on Wednesday."