how about a shinez fic wherein they've been divorced for 4 years but they agreed to co-parent for the sake of their child. the reason of their divorce? yunjin was being negligent, forgetting that she still has a family at home waiting for her while she buried herself for work and the last straw for kazuha was when yunjin failed to pick up their child from their daycare. their son waited for their other mommy for hours, until it was dusk. later on, it was kazuha who picked up their son crying at the sidewalk just outside the daycare. (so it's like a second chance au and their child will be the key to get them back together. kazuha is secretly an underground fighter while yunjin is a lawyer)