Mystic-Eyed Shinigami: Bleach MESB

The Original Sin of Soul society; A sin that questions the very root of the morality of the Shinigami, which was erased from the history by their noble families.
A million years later, Shinigami Araya Shohei, who was retired from the services and quietly living in the human world, decided to involve in their mess and started a whole new chapter.