Why Did I Do It? [Blue Exorcist Fanfiction]

"I could feel his blood dripping down my arms but I kept going, one punch after another. The worst part, was that I enjoyed it."
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Rin Okumura is just like any other student; he goes to school, tries to study and acts like a rebellious teenager. What people in Rin's new school don't know about is his dark past. Was this an attempt to start acting like any other student and become a better person or might Rin just find out why he is so unusual?
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This is a prequel fanfiction about our beloved Rin Okumura. It talks about Rin's dark past and how he gets expelled from his school only to find himself in a situation where he has to act normal in order to not end up like he did at his last school.