ShutterBox

ShutterBox is an original English-language manga written by Rikki Simons and Tavisha Wolfgarth-Simons. The first volume was published by Tokyopop in 2003. The second volume was published in July 2004. The third volume was released in August 2005 and the fourth volume was released in September 2007. As of September 22, 2011 five volumes have been released in eBook format and are available to buy on their shop.
Plot summary.
When Megan Amano dreams, she journeys to a place called Merridiah University, one of the afterlife's premier educational institutes. There she studies as an exchange student, learning the skills necessary to become a living muse. Traditionally, only spirits attend the university, where they are educated before being reborn into the world of the living. However, Megan is still alive. She attends college in Santa Monica, California by day and Merridiah University at night. One day, she finds mysterious pictures from the dream world in her digital camera. They reveal a mystery so deep that Megan is compelled to question her very existence and set forth on a quest to find the answers.
Volume 1.
Orientation, Damien, Adrien, and the Running of the Hyperpans
The story begins right after graduation of high school in Santa Monica. Megan Amano is wandering the beach trying to seek slight solitude from her friend Dagny and fellow students. While there she watches Adrien 'AJ' Crandall, a fellow high school graduate, walk into the freezing water and disappears. Later on, Megan is in therapy, requested by her mother Frankie, talking about her dreams to her therapist, Peiter Troia. She tells him about a place that she visits when she dreams, a place called Merridiah. While there she sees Adrien running through the fields.
That night after her session, she heads home (which is next to her mother's) and falls asleep being sent to another part of Merridiah. After she meets the Beebos (flying rabbits) she meets Damien, AJ's twin brother. Once she is given a more sophisticated dress instead of her sleepwear, she is sent to the fields with a letter that she must give to AJ. She landed next to a banshee and accidentally gives it attention, causing it to explode. Megan continues her journey in finding muse. After she catches him (literally) she gives him his letter and he leaves her there, alone.
Volume 2.
First School Quarter
Volume 3.
Entry Exam
Volume 4.
The Angel of Childhood's End
Volume 5.
The Angel of Death Unbalanced