Run, He's Not Human!

The aloof male protagonist is not a human being: Damn girl, she is not alive for a fraction of my life, please give her a good treatment! She ran away with her son, only to find out that she was not a human being! Hostess: What is my fate? The soon-to-be sister-in-law pretends to be close and acts as a bodyguard for her nephew and his mother: Brother, you have too many pinhole cameras! Half-demon, monster, human, the original career struggle of a divorced woman has turned into a weird life of hit-and-run - making friends with monsters - and people vying to be a stepfather for their children!