The article is out of date. According to this one, the game was removed from sale on Steam yesterday in the UK, Canada and Australia, and the dev is going to withdraw it from Steam entirely.

Zerat Games has announced it will withdraw its sexually explicit visual novel from Steam after it was removed from sale in the UK, Canada, and Australia.

Posted to the game’s Steam page, which is no longer accessible to those who have not previously purchased the game, the developer defended its title but confirmed it would be removed from the platform.

“We don’t intend to fight the whole world, and specifically, we don’t want to cause any problems for Steam and Valve,” the developer said.