I love this manga a lot. The contrast between the first and the second half is especially what makes it special to me.
The first half seems like a nightmare where everything went wrong, whereas the second half is like one's sweet dream when imagining everything bad was finally solved with one's...
It would be interesting if the MC got cucked, but the reason why I read this is because it's a fantasy for people who just adore a cute childhood friend but can't have them.
Whatever.