In this one-shot Ria Hironiwa wasn't killed by Akira Kobayashi, she survived to 1999.
Her brother - Kenshin was killed by Naoki, she and him together killed Akira, who turned out to be Naoki's father – Shion Muneyoshi.
Naoki, through spending a few years in the orphanage in Switzerland and the inhumane things he was subjected to, was a year older than his classmates, and even though he was in the third year of middle school and Ria was finishing high school, they were only two years apart.
Although Ria and Naoki were from clans that had been hostile to each other in the past, they fell in love with each other.
Yuukichi Hironiwa decided to talk to Naoki.
- It surprises me a little that despite coming from an enemy clan you are dating my daughter.
There are so many obstacles between you two and you don't want to let it go?
-I believe that conflicts between our clans should be left in the distant past.
Along with Ria, I even killed my own father, who killed many of her relatives.
However, even my mother and my siblings fell victim to him.
Both you and I and Ria are, in a way, his victims.
-Do you realize that my daughter is 2 years older than you?
In addition, despite your age, you still go to middle school.
You should be in the first year of high school, which means looking at the current date you should have already finished it
-Well yes, she is older than me, but 2 years is not a huge age difference.
- I guess I don't mind anymore, let me let you have your way with my daughter.
However, if you do something to her then know that the Muneyoshi clan will not die out on you alone.
Both you and the doctor will die out in the cruelest way possible.
-I have this in mind sir
-It's good to hear.
Naoki left the meeting with Ria's father,
She was already waiting for him outside the door.
-How was it?
-I thought he would react more aggressively.
-He acted more aggressively towards me when he found out.
But it's good that he got over it.
-Hey Ria, do you feel happy?
-Eventually, this hatred will be ended.
Even if our relationship does not stand the test of time, you have shown your goodwill to the entire Hironiwa clan.
-I think it will be different, though.
Ria and Naoki smiled to each other.
A few days later, Naoki and Ria were on a date, completely coincidentally, Mei and Kouichi were also at the same cafe.
Kouichi noticed Naoki and Ria.
-Huh? Isn't that Muneyoshi-kun by any chance?
-That's how he is, he doesn't have one arm.
-Did his girlfriend accidentally...
Doesn't she look older than him?
-I heard that Muneyoshi-kun is rumored to be dating some high school girl.
She is reportedly in the 3rd year of high school
-W-what?
But we barely finished Middle school!
-Muneyoshi-kun is a year older than us, in addition, as far as I know Ria I guess that's her name is from December.
Muneyoshi-kun is from Febuary so…
She is two years and two months older than him only.
-How do you know this?
- I overheard his conversation with her once.
-I find it a little hard to believe, but I guess it's good how Muneyoshi-kun is happy right?
Mei just nodded and slightly smiled.
Naoki and Ria's date has passed.
Ria decided to finally ask Naoki
-Naoki… We are couple now?
-As you think, in my opinion, yes.
Ria blushed.
-Oh.. Then It's… historical… I guess?
Naoki smiled a bit
-Yeah it is
Naoki hugged Ria.
-You are a really important person for me, Ria.
-Y-you too…