This maybe the reason why it's Josei. It's complicated matters to begin with.
Adults certainly have a problem that maybe people in their mid-20s will not understand. Just like me, but I kinda? understand it, a bit.
The situation is different. Do not forget to consider many aspects, whatever it is.
But to be honest, I prefer their previous works such as 1/2 Ringo and Barairo no Saisen.
Great series with good plot and character development. But this one, is nothing special in particular. It's just like I see an affair between couples and they make each other worse.
And this I almost often see in other series like 1122, Ane no Kekkon, etc.
The best Josei manga (similar to this, heavy circumstances but well-built) are Nigeru wa Haji da ga Yaku ni Tatsu, Itsuka Tiffany de Choushoku o, etc.