I dropped this when the amnesia arc started can sm1 spoil it?

I don't remember the names, sorry.
I really dislike amnesia, good it wasn't toooo long. Whats also upsetting is that the story ends with that. But anyways, the kids stay with the grandparents so they don't see their dad forgot them, it doesn't really go well, they're sad and all, he has migraines all the time, works alot because that, he remembers. They still have a lot of sex.
It ends with the red hair daddy going in heat and the black hair was working but suddenly remembers everything, just like that, and he rushes back to be with him.
Ends with all the sex because of the heat, I think the last 2 chapters is mostly sex scene.
I might have skipped some infos but that's the main.
But you should read the side stories, the babies are cute (but I personally didn't like the last one)