Spoiler I don't know but there is this detail where the mc has two different character growth depending on the two paths between emma and the main story
I dunno its just an amazing detail
In emma solo ending the character growth of the mc is a bit humorous and funny and he is also a great husband to emma the mc in this story is more wise than the original story and he can think of an any solution and understand emma and leah in any problems hes more like a father actually.
In original path where the serum takes place the character growth of the mc is so clear and more mature than the mc on emma solo end i like the character growth of the mc here because you can also see that by change of art style. The character here is more detailed because of the story although the continuing story is more adult now and reduces the comedy of the game thats why the mc is more serious here (i wish niichan bring back the prologue vibe where the story is more funny and enjoying to read. i dunno in the start of chapter 1 everything changed and the worse is aine character change)
This is actually amazing because you can see how all character grow specially the mc
This is why i like this game because it has more story rather than the main reason why you play this game🤨
And i still like emma.