All The Lovers in The Night by Mieko Kawakami

Fuyuko Irie is a freelance proofreader in her thirties. Living alone in an overwhelming city and unable to form meaningful relationships, she has little contact with anyone other than her colleague, Hijiri.

But a chance encounter with a man named Mitsutsuka awakens something new in her. Through their weekly meetings, Fuyuko starts to see the world in a different light and still, painful memories from her past begin to resurface. As Fuyuko realizes she exists in a small world of her own making she begins to push at her own boundaries.
But will she find the strength to bring down the walls that surround her?
 
Poetic, modern and shocking, this is an unforgettable novel from Japan’s most exciting writer.