For those who aren't on Discord: According to the developer, the game is going to be released as SFW on Steam and Itch.io once it's finished. The NSFW content will then be added via an external website patch. This is because the game's main focus is voyeur content, which is completely forbidden by Itch.io's new guidelines imposed by credit card companies.
The game has undergone a major overhaul for a little over a year. It has switched from the Godot 3.5 engine to the Godot 4 engine, updated the art, and added a lot of content, including more characters, real-time schedules, new maps, and scenes. The aim is to turn it into a fully-fledged open-world dating simulator fully enjoyable as a SFW experience but the NSFW content is the soul of the game and the main focus. According to the developer on Discord after the whole credit cards scandal, if anything prevented him from adding NSFW content, the game would be over.
Vigilia is a side game that is mainly made using Love Inn's code. According to the developer, its purpose is to give something to players who support the project while the main game is still in development, but it is also used as a testing room for some of Love Inn's mechanics and will also feature a +18 patch.
This is just a brief summary of what has been happening with the game. If you want more details, you can visit the developer's itch.io page. Feel free to believe or not his words — I'm just informing you.