Angels are said to be sacred beings.

Beings with pure hearts who listen to people's prayers and guide lost souls.

──Or so they say, generally speaking.

However, reality isn't quite like that. Even angels live in an era where they have to work.

Soul collection, cleaning up lingering attachments, sorting prayers. Despite the sacred ring to it, the reality is a repetition of steady labor.

In a corner of the heavens, there is a small branch office. Heavenly Affairs Bureau, Seventh Branch Office.

Working there are four people with different eras, hometowns, and values. They were all once human.

But none of them remember their past.

There is only one thing they all have in common.

──The fact that they "▒̂͝▦̷͝▦̷̂▩̕͝▧̞̕◩͔̍▩̂̕ for someone else."