The Place You Called From

The Place You Called From summary:

The Place You Called From & The Place I Called From are novels by Sugaru Miaki, also known as Fafoo, writer of Starting Over, Three Days of Happiness, and Pain, Pain, Go Away.
The story is about a boy entering high school, who answers a strange call from a public phone one night. The caller challenges him to a bet: She’ll remove the birthmark which he sees as the cause of so many problems, and he’ll have fifty days to win the heart of a girl he’d considered far beyond his reach. And with this, a very strange summer begins.
Volume 1: The Place You Called From
Volume 2: The Place I Called From