Tokyo Tarareba Girls Vol. 3 (manga)

When it finally seems like Rinko has caught a break, it disappears almost as quickly--thanks, once again, to Key. Meanwhile, Kaori finds out that she's not the only one her ex is cheating on his girlfriend with, and Koyuki learns her married boyfriend's wife may not be as estranged as she seemed. And yet, faced with the relentless void of loneliness, the three continue to make choices even they know they'll regret.