I did think of the those things that you were saying while reading along the fic, but even if you can love two people in the same lifetime, I guess loving two people at the same time, (with one already dead) is asking for too much trouble.
Don't get me wrong, ❤❤❤ to Oh, of course, but in this univ, I feel Sho belongs to Kazu. Anyway, maybe in this case, it'd be best for him to return to Oh-chan.
And yep, no matter what universe, Kazu's a smart-ass! Hihi!
Hugs!