The two cases are rather different, as I understand them. The only similarity is that they happened in a love hotel. In the recent case, a girl was killed by a nut. In the January case, the girl was working with two male accomplices who would either drive her away, or rough up the papa if he chased her out of the hotel. I imagine that she was only supposed to grab his money and run, but something went wrong and she wound up stabbing him to death. I wonder if the knife was her, and was only meant to threaten the old guy, or if the old guy pulled it to defend himself.
I recently signed up for sugardaddy.jp Even though my profile makes it clear I am from an English-speaking country, only a few girls who have contacted me write in English or say they are interested in foreign countries, etc. The majority just send spam messages saying they can meet at a hotel right away, and if you reply once, they never let up. Some of them may be meeting for what they say, but some may be just out to steal wallets.