Thematically and stylistically relevant works to consider include The Time Traveler's Wife by Audrey Niffenegger, The Night Circus by Erin Morgenstern, Kitchen by Banana Yoshimoto, and Hard-Boiled Wonderland and the End of the World by Haruki Murakami.
Kawaguchi's other books in the series may also be of interest: Tales from the Cafe: Before the Coffee Gets Cold, Before Your Memory Fades, and Before We Say Goodbye.