Jikuu no Cross Road 3 Birthday wa Eien ni

is the third volume of the Jikuu no Cross Road light novel series, written by Kazuyuki Takami and Illustrated by Anmitsu Sou. It was released under the Dengeki Bunko Imprint in September 2001.

Synopsis
"You're out of luck, but when you see someone who's more unhappy than you, you're trying hard ..." Natsumi Asagiri, a girl who was abandoned by luck so much that her best friend lamented. One day, a mysterious old man appears in front of her. "I can turn your bad luck into good luck. What should I do? I'll try." A mysterious device given by an old man. Natsumi, who pressed the switch, arrived at the collapsed Tokyo. "In such a messed up world ... where on earth are you lucky!" Natsumi is embarrassed. But there, she will experience an unforgettable summer.

(source: Bookwalker JP - Translated)