Now imagine a collab between Taiyaki and Itou Hachi.
I'm actually surprised we haven't had much double divorce, double mom yuri with some step-sister love as a side dish. Also, make all of them actually blood related that comes as a special reveal at some point.
Scumbag husband had two families, the moms met at the funeral, decided to live together instead of selling the apartment to split, maybe even antagonistically made a bet of whoever leaves the apartment first loses it, yuri ensues with the mothers and the step sisters
Extra hard mode: double age gaps couples consistent of a mother and the daughter of the other marriage, they desperatly try to keep it hidden from one another..
There's the colab