Kei often gets involved in fights, despite of him being weak and always end up losing… One day, while helping a friend to bring some textbooks to an old building of his school, he and his childhood friend, Tomoe, are attacked by a monster. In order to save his friend, Kei will choose to become a Grave Protector!* Cerberus in ancient Greek mythology was a three headed hell hound with a snake tail that guarded the gates of the Underworld preventing those who have crossed the river Styx from ever escaping.from Easy Going Scans
Cerberus
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