The back story of 'ordinary angels' could vary greatly depending on the fictional universe or belief system. In some fantasy settings, ordinary angels might be a lower rank in the angelic hierarchy. They could be created by a higher power to maintain balance in the world, perhaps having the power to influence small things like good luck or a bit of protection for the kind - hearted. They may not have the grandeur and extreme powers of the archangels but still play an important role in the overall scheme of things.
In the ordinary angels back story, a crucial element is their connection to the concept of good. They are often associated with positive values like love, compassion, and justice. Their back story might involve how they came to embody these values. Maybe they were taught by a wise elder angel or learned through their own experiences. Their relationships are another key aspect. This could include their relationships with other angels, whether they are friends, rivals, or part of a larger angelic community. It could also involve their relationship with humans. For example, if an ordinary angel has a special bond with a particular human family, the story of how that bond formed and developed over time is an important part of their back story. And finally, their personal growth and development within the angelic realm. They may start as naive or inexperienced angels and through various events and challenges, grow into more mature and powerful beings.
Since I don't know the exact 'ordinary angels story', it could be ordinary people like a kind - hearted bus driver, a helpful store clerk, or a friendly neighbor as main characters.
I'm not sure which specific 'ordinary angels story' you are referring to. There could be many stories with this title. It might be about ordinary people who act like angels in someone's life, like a neighbor who helps an old lady with her groceries regularly, showing kindness and selflessness.