Pg 17:
It should have been obvious if I thought about it

If Kouhei died and his spirit entered another body
Then that body ought to have someone else inside it too

Pan 2:
Um...I
am "Haruka"

(Right now both Both Kouhei and "this girl"
are inside her)

pan 3:
Our two consciousnesses can take turns, but....

We can't predict when it will happen, so it's a shock whenever we trade places...