What if fluffy was an animal who turned into "human" that's why we see Mister. A patting his head when fluffy was a DOG in the flashback.
That’d make sense given that fluffy is also (in the nicest words) dumb, it’s obvious that he doesn’t know anything
The Beast Virus humanised Mr A's dog perhaps?? Or he was just too young when the Beast Virus hit him so he succumb more into his animalistic instinct?
Little A and Mister. A are the same person?
In a world where normal people got animal characteristics I don't think it's impossible...
He wants to have all of TJ this time
Just talk and marry each other