There is a deeper meaning to the name "Saja Boys." The Korean word "saja" can mean lion and we see that their logo and branding include lion imagery. However, in Korean folklore "jeoseung saja" are grim reaper figures who escort the souls of the dead to the afterlife. Typical depictions of jeoseung saja show them wearing a black hanbok and a gat (wide brimmed hat) just like the Saja Boys in their demon forms.
The film received 325 million views within its first 91 days of release, making it the most-watched Netflix film, surpassing Red Notice (2021), which received 231 million views in that timeframe.
In an interview with Forbes, director Maggie Kang said that the Saja Boys "share the same CG body, except for Abby Saja, because he's a little bit bigger, we bulked him up like 20%."
The soundtrack has four songs in Hot 100's top 10s simultaneously, surpassing Saturday Night Fever and Waiting To Exhale, each of which had three songs in the top 10 simultaneously.
According to co-director Maggie Kang, the Maltese tiger and magpie duo whose names were not revealed in the movie are named Derpy and Sussie, and the reason why they can travel between the human world and the demon world is because they are not demons, but Korean supernatural creatures. She based them on a famous Korean folk painting of the Tiger and the Magpie.