Here we go
Kaoris area of time
It was 1981 and it was the start of the new deployment for Kaori, the Berlin Wall, a duty significant to the Cold War, after all this was the main barrier between West and East blocs.
Kaori has command of a few student officers and many soldats, generally her days were similar to her days in Austria, patrolling the boarder with a German Shepard and make occasional arrests around the boarder,
However one day, she had to something that she had never done as a boarder guard
One day, Kaori saw a guy try to flee East Berlin to West Berlin, as he got halfway, Kaori was ordered by a higher up to shoot him and then Kaori aimed with her rifle and pulled the trigger, ending that guys life.
Kaori felt horrible, imagine if Kōusei or her parents had known she had done something like that, he would feel disgusted, However Kaori felt like as much as it was horrible, had she not pulled the trigger, she would of been shot and would never see be reunited with Kōusei, so it was pretty much a lose/lose situation.
Kaori then went back to her normal duty's as usual, sometimes she had questioned people on the checkpoint entering legally, well at least she wasn't shooting at them,
In October, she as summoned for a meeting, a meeting that would change her life, she walked in to find Generaloberst Kreigspeer, Erich Mielke (Leader of the Stasi) and Erich Honecker (Leader of East Germany), Kaori sat down nervously believing it was a court martial and she would be taken away for questioning (basically being sent to a gulag).
It was Honecker who started the conversation
"We've been very pleased with your performance as a solider comrade" said Honecker
"So much so, that you've been given a new assignment" said Kriegspeer
"What is it" said Kaori
"Hello, Underleutnant Miyazono, I'm Erich Mielke and I'm the head of the Stasi, We would like you to join us while serving as a boarder guard, you will receive better promotions and who knows, in a few years you'll be head of the the boarder guards" said Mielke shaking Kaoris hand
"Nice to meet you" said Kaori
"There is one condition though" said Mielke
"What is it" said Kaori
"Most of your Stasi duties will be spying on your fellow troops, but we may need you for duties that could change this Cold War for the side of the Warsaw Pact" said Mielke
"I accept for East Germany, the Warsaw Pact and for Kōusei Arima" said Kaori
"Whos Kōusei Arimia" said Honecker
"It's a boy I like" said Kaori
"Is he loyal to the party" said Honecker
"Yeah totally, very quiet and shy, loves music though" said Kaori, showing a picture of Kōusei to the 3 of them, the picture had been given to her as a momento by both Saki and Lord Metcalfe to remmeber who she is fighting to be reunited with.
"You two would make a great couple" said Honecker smiling
Meanwhile in the present day
It had turned March and with that time moved on, Kōusei, Watari and Tsubaki were still at school, nearing the end of junior high, Kōusei still felt grief, but with the help of Watari, Tsubaki, Nao plus Hiroko, Nagi, Taskehi, Emi and Kaoris parents, he managed to move on a bit from Kaori and continue his piano career which he was improving, it's like Kaoris death helped him evolve as a pianist.