Hello, so I am "Delta" from the discord chat.
I contacted a Nutaku Staff in their discord's Q&A channel. At first they thought it was the ISP blocking the game, which doesn't make sense since I've been playing for years now and it wasn't blocked at all during the period, as well as why is only Comix Harem affected but not Harem Heroes on the SAME SITE.
They told me to use a VPN, in which I have tested 3 (Seed4Me, Proton, Windscribe), and still wasn't available to connect to the game and Nutaku refuses to connect.
And this was their response:
So I have sent a ticket and havent received a reply yet.
They also recommended me to clear my cookies and cache, which is annoying, but I did to no avail.