It's a part of a series called Mr. Blue BL Short Stories: Unusual Families or sumn. Idk anything about the origin of this/ whether Sagold wrote the story to go with a theme (coz there's other manhwas from other artists) or if "Mr. Blue" is the writer for all the manhwas. I think it's the later tho.
can't believe sagold wrote something like this, this shit is crazyyyyyyy