All the episodes can be found in Drama-otaku but you have to register there to view it. Episode 1 subs is already posted there as well.

kotsubs | Current Projects (dreamwidth.org) 

 KaitoXotaku:

Hello, thank you for subbing this drama. 

What vpn do you use to access the website tver.jp? I am trying several ones but the episode is not loading. And how can I download the episode so that I can add your subs to it? 

I use flyvpn mobile app to access TVer through mobile browsers and the app. And for computer, the tunnelbear VPN worked fine.