The protagonist is Fran, and the pairing is Squalo.
The protagonist is supposed to have transmigrated, but basically can't remember any of the plot. I can't bear to write a story without transmigration~ Sob, sob, sob, sob. [Hey! That's enough!]
So you can also read it as if he never transmigrated~
As for me, I can barely pick up on details when watching anime, and I have a terrible memory, so if any plot holes crop up, just assume they're butterfly effects caused by the protagonist's transmigration (?).
I've only watched up to the point in the Future Arc where Byakuran gets beaten to a pulp. I don't know anything about what comes afterward, like the Inheritance Arc or finding little Fran after it ends! If things don't line up, just ignore it.
P.S. Hahaha~
A-anyway! I'm a loving author~ Please add my author page to your favorites~
: