I actually liked this first chapter. Wasn't what I expected the spin off to be. I thought it was gonna be like some 4-koma slice of life thing. I'm hoping the tone of the series stays like this since the first series had enough drama for a lifetime.
Since it's going the "season 2" style route, I kinda wish they saved the marriage scene for the end of this series. It's kinda weird that "s1" showed the future, but s2 is a direct continuation.
I'm personally crossing my fingers for proper Mei character development this time, but I'm keeping expectations low. More Harumin/Matsuri scenes would be great too.