Part 1 is below it
Part 2:
At the same time, Kiyotaka would remain the dominant consciousness. Wataru would gradually dissolve into him — not disappearing, but being absorbed. His emotional tendencies, habits, and subtle behaviors would begin surfacing in Kiyotaka in strange, almost subconscious ways.
You could show this through small, almost unnoticeable details:
1)Kiyotaka picking up the phone to call “his” mother or father in a tone he never would have used before.
2)Food preferences shifting slightly — liking dishes Wataru used to love, disliking things he previously didn’t mind.
3)Minor speech patterns leaking through.
Emotional reactions that feel unfamiliar even to him.
Eventually, they would become inseparable — not two people sharing a body, but a single, integrated existence.
And through that integration, Kiyotaka would finally have a reason to stay.
Not because he abandoned his old world.
But because this new identity — this merged self — belongs here.
To make the merge powerful and smooth:
The merge must be slow.
It must be uncomfortable.
It must occasionally destabilize him.
He must resist parts of it.
I would much prefer he stays or goes back and somehow comes back again...