Well I think this story is going to get like a train...
I know that adultery is quite common in Japan, but all those stories that starts with a married couple is a big turn off to me...
Well in that case the husband seems to be aware of it, to a certain extent, but still. I'll wait to see what people are saying about it, to judge if it's worth is or not.
Is there anywhere it isn't common?
I think this type of story is somewhat common because of a lot of various circumstances with society, and I think that's pretty global.
Well, I'll be honest, I never looked into the numbers, but Japan has a reputation of having a big issue with sexless marriage and having a lot of extra conjugale affairs. To the point that in some married couple, there is an unspoken agreement about "be discreet, and we won't talk about it".