The Strongest Onmyoji's Retirement

In an age when humans and ghosts coexisted, there was a group of people who could draw talismans and write seal script, freely traveling between the worlds of yin and yang. They were known as onmyoji.

The gifted onmyoji Abe no Seimei displayed unmatched talent from childhood. At a young age, he became the strongest onmyoji, stopping disaster after disaster. At last, his fervent followers elevated him to the highest position among onmyoji: the Great Onmyoji Lord.

But even Seimei grew tired. In his old age, after making arrangements for what came next and saying goodbye to his old friends, he prepared to bring his life to an end. Only... why does this Meng Po Soup taste wrong?