Tenraku Akuma! Demon’s Core

The summary of Tenraku Akuma Demons Core from MangaHelpers is about an exorcist who has successfully defeated a demon. However, another demon suddenly falls from the ceiling, but this one is different from the previous one. She doesn’t have horns, she’s dressed in tattered clothes, and she’s starving. Despite claiming to be after his soul, she poses little threat. Instead of killing her, the exorcist takes pity on her and buys her food. Now, she wants to accompany him and help in any way she can.