A/N: Before I start I'd like to clear up one thing, first of all, Alex died before Oshi no Ko got published, so he has no idea who they are and what anime or manga they came from.
Also, while he may expose the fact that he's a reincarnator, he won't say anything about their world is fiction to him, that's kind of against the rules and also there's no chance of Lorelei and others, aside from D or Root, would know that he's a reincarnator because exposing himself to everyone is definitely a no brainer, the reason why he told the twins about his circumstances is that he felt kindred to them.
—
-Ruby & Aqua PoV-
They can't believe it, never in their tiny minds that their 'father' is apparently in the same circumstances as them, a reincarnated person.
That's why they couldn't hide their surprise, seeing their strong reaction, he chuckled at them and said. "Surprised?"
To say that they were surprised was an understatement. "Surprised?! Of course! Why wouldn't we be not surprised by the fact that our biological father is a reincarnator like us?! Wait! Could this be genetic?!"
It was Aqua who thought that, and Ruby couldn't find herself disagreeing with her older twin's statement.
Aqua's words made their father pause for a moment as he gave them a pondering look. "I mean…that statement isn't really incorrect, but I doubt that's the case.."
"Anyway, mind if I ask you two questions?" Their father Alex asked.
Seeing that there's no harm in answering, they nodded and their father said. "Do you still remember your previous life names?"
That's a strangely specific question, it honestly made Aqua a bit cautious and was about to ask their father 'why' However, his less intelligent twin immediately answered. "Sarina, Tendoji Sarina."
And that made Aqua's little body freeze as he remembered a certain patient that he took care of when he was still a medical doctor, and the reason why he became Ai's fan.
"S-sarina? Tendoji Sarina?" Aqua stared at his twin sister and thought. 'No way.. could she be the same…b-but if she is what are the chances..?!'
Ruby shifted her attention toward her twin brother and was confused by his reaction and couldn't help asking. "What's wrong Aqua?"
"Ruby tell me…are you a patient with anaplastic astrocytoma before you reincarnate?"
Ruby was stunned at such a specific question and replied shatteringly. "H-how did you know-"
Her answer confirmed it all and Aqua couldn't help but say. "Seriously..? Is this some sort of fate…?"
Aqua didn't really believe in fate or similar illogical concepts as that, however right now he's willing to because this is too much of a coincidence.
Then he looked at his twin sister's eyes and confessed. "Because Ruby- no, Sarina, the reason why I know that you're a patient is because I was your personal medical doctor."
Ruby looked confused for a moment before realizing what he said.
"Wait you're-"
Aqua nodded to confirm it and answered. "That's right, I'm Amamiya Gorou."
Ruby's eyes widened in shock. "N-no way! Sensei?!"
Aqua nodded and he was also shocked but more controlled. "It's me, Sarina."
Without a warning, Sarina, now named Ruby, hugged her older twin's body tightly, happiness was visible on her face.
"No way! No way! Is it really you sensei?! I can't believe this is happening!"
Aqua couldn't help but smile as his sister's happiness was infectious. "Same here Sarina…"
They temporarily forgot their father who was listening to their conversation in silence, and finally breaking it. "I take you two know each other in your previous life?"
"T-that's right!" Ruby was crying in happiness as she continued to hug her twin brother, who is her doctor and crush in her previous life.
"What are the chances..this definitely isn't a coincidence.." Their father looked oddly suspicious about something, it was as if he knew something.
"Maybe.." Aqua replied, there's no way to answer that question after all, they are diving into the supernatural territory and he knew absolutely nothing aside from what he heard from his biological father's sister.
"Anyway, how old were you two when you died? And what is the cause of your death if you don't mind answering?" Their father asked.
Normally, Aqua wouldn't answer such a question but at this point, was there really a secret that he has that is worth keeping?
So he answered. "I'm 28 when I died and the cause of death was that I was murdered."
Ruby gasps in shock as she hears that her sensei died because of murder. "W-what?! Y-you were murdered?! By whom?!"
Honestly, Aqua was surprised by how causal he was treating his death. "I have no idea, but I do know that the murder is Ai's stalker."
"WHAT!!"
Aqua couldn't help but wince at his twin sister's exceptionally loud voice. "Yeah…yeah.."
"So you were murdered huh..?" Aqua noticed that there's a strange glint in his father's eyes when he mentioned his apparent death.
"Yep."
Suddenly he asked something he didn't expect. "Did someone know about your death?"
Aqua blinked and thought about it and replied while shaking his head. "No, I don't think so as there's no news about my body being found yet."
"HUH?! W-WHAT?! NO KNEW ABOUT YOUR DEATH SENSEI?!" Ruby screamed with her little lungs.
If she continues to be this loud, it wouldn't be just his eardrums would be broken, the people who are in this house, sans Alex, would know about this commotion.
"Sarina, can you please stop shouting…?"
"HUH?! YOU EXPECT ME TO AFTER HEARING THAT YOU GOT MURDERED AND THE PERSON WHO MURDERED YOU IS STILL ON THE LOOSE?!" Ruby did not stop shouting.
Aqua pauses for a bit, and what she said does make sense, but still, if she continues to do this everyone would be woken up by her loud voice.
"Don't worry about waking everyone up, I've already put a bounded field to prevent anyone outside this room from hearing the content of this conversation, you can scream all you want no one would hear this." Their father smiled and gave them a wink.
T-that's very useful…as expected magic is awesome..!
"Anyway, let's continue this conversation about your apparent murderer, tell me every single detail that you remember about that person."
Aqua spared no time and explained what he knew about his killer, with his father's support, maybe his death would finally achieve justice.
Although, this is something that he won't say out loud but, he was glad that he died and got reincarnated. It wasn't like he disliked his previous life but this life was significantly better than the last.
—
It was such an interesting conversation with my children, although they are reincarnated babies, it doesn't change the fact that they have my blood inside them.
The fact that their reincarnation doesn't change anything, I wasn't shallow just because their soul and mind is another person entirely, they were still mine.
And besides it would be hypocritical of me to reject them, as I'm the same as they are a reincarnator, as a person with the same circumstances it was my job to guide them properly, not hate them for being the same.
Anyway, my son was apparently murdered in his previous life by Ai's stalker, Barthomeloi or not. The fact that there's an obsessed murderer on the loose right now, needed my primary attention.
Who knows in the future that person would be a threat, not to me but to my children and Ai.
That's why I have to find the suspect, also the previous body of Aqua was somewhere, finding it would be just a matter of time before I would give his body a proper burial.
It's only natural, as he's my son after all, previous or not, the fact that he's a Barthomeloi now is enough.
Anyway, I need to take a call to find the suspect that murdered my son's previous body and also find his body.
Aqua gave me the location of where it may be, so it would take a day or a few at most, I took my phone and called the group that would willingly investigate the matter with the right price, money isn't really a problem for me.
No offense to the police, but most of the time they are incompetent, I'd rather hire people that could finish the job within a few days.
—
After I discussed the terms and conditions with the group, which they gladly accepted with a happy tone, it would only be a matter of time before this case would be solved.
Either way, now that one of the problems has been dealt with, there was another that I wanted answers from.
My children's reincarnation, it was too convenient to be a coincidence. I know that the concept of 'fate' exists in this universe, however, their reincarnation is just too convenient.
I have an inkling of suspicion that D had something to do with this, honestly almost every chaos in my life had something to do with her, I'm not even going to bother defending her.
That's why I needed answers. Normally when someone needed an answer, they would start looking for it, but in my case, I don't need to, because the person I'm looking for is right in front of me. "D."
"Hey Alex, was it just me, or you disappeared from this world for a few minutes?" D smiled beautifully.
'Oh, damn why does she have to start with that?' I groaned internally, I knew there was someone who would ask about my disappearance.
—
A/N: D obviously would notice his disappearance, it would be strange not to consider she claimed to be omnipresent.
Also now that the twins know that they knew each other in their previous life, would there be incest…?
Honestly, I don't know nor do I want to think about it.
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