This was a strange book, I'm not 100% sure that I understood it, and I really felt disconnected from it, and I'm not sure if that's the book, the differences in cultures or the translation.

I found the main character Shibata decides to fake a pregnancy, as she is bored/sick of being the work mother, picking up and generally doing jobs her colleagues are more than capable of.

She tracks her "pregnancy" on an app, and goes to pre-natal exercise classes, but doesn't tell her family she is "pregnant" but then later complains of such terrible loneliness. 

I don't really understand what this book was for, I enjoyed myself while reading it on the whole, it felt cozy, but I think I may have missed something.