" Before the coffee gets cold"
This is basically a tale of four people from Tokyo, who visit a special alleyway Cafe Shop. The book hence 4 chapters centering around one person, who is able to time travel while he\she sits and enjoys a cup of coffee.
It quickly emmerge yourself into all character's past and present with a smooth alteration of their future.
Personally, I don't find it as a sci-fi genre, however this is an ambitious attempt at magical realism, confined by its subject of time travel, which over time has evolved almost to a static without allowing those ones travelling to see their faces anymore.
8/10