The Hong Kong Kowloon Treasure Murder Case File 4 - S1-E4
Plot hole: Miyuki has been peacefully waiting for over a day at a stranger's house because she was told that the whole Hong Kong was under lockdown and her friends were in another location. That cover story (which would have been exposed if only she looked out of the window, people were NOT in lockdown) does not explain at all the kidnapping in the clothing stall or why she didn't have her phone or talk to Hajime at any point. She'd have to be braindead not to question even slightly what was happening.
The Hong Kong Kowloon Treasure Murder Case File 4 - S1-E4
Plot hole: The plot involves mother and daughter having a matching tattoo on their butt. This episode tells us that they had the matching tattoo since Ran was literally a child since her father himself did it. It's easy to understand that since kids, you know, grow and all, a dragon on the buttock of a 6 years-old would be quite different when they are all grown up. And it's no small tattoo and it needs to be accurate because it's a map.
