Zilrael

In a modern world where demons and angels do not exist, a group of unlikely creatures live amongst each other, acting as high school students. Zily Drake, locked away for hundreds of years, is forced away to this encasement, as she comes across people like herself, she finds her best friend to be her exact opposite and forms a crush on creatures she had been taught to despise.
As she's caught between heaven and hell adventures roam and friendship grows, only one friend will remain peaceful, her anchor, her celestial.