This is a really solid show. I dunno why it's so underrated! It's not your average anime, however it was honestly enjoyable and had me at the edge of my seat! Personally, Ah Lang was my favourite character, I really think you'll enjoy this character too. The story is very good and unique for only six episodes, though at times it may feel rushed keep that in mind. You can tell that the studio put in a lot of effort. You can watch it on biliblili very easily.
Overall: Very good show - unique storyline and characters. Just every now and then it feels rushed.