Most of the time, yes. Since these visual novels typically involve explicit or suggestive content, they are not appropriate for those under the age of 18. There are age restrictions in place to protect the younger audience from being exposed to such adult - oriented material.
Definitely not. Mainstream media is meant to be accessible and suitable for a wide audience. Smut visual novels are not in line with this as they contain content that is not suitable for public consumption, especially for younger audiences or those who do not wish to be exposed to sexual content.
I don't recommend focusing on'smut visual novels' as they often contain inappropriate content. However, if we consider visual novels in general, some popular ones are 'Danganronpa' which has an interesting mystery - solving and character - driven plot.
One popular one is 'Katawa Shoujo'. It has a unique art style and engaging storylines that explore different themes and relationships. However, it's important to note that this genre often contains adult - themed content, so it may not be suitable for all audiences.
Smut fiction is a type of fictional writing that contains sexually explicit content. It often focuses on sexual encounters, relationships, and desires. However, it is considered a form of adult - oriented literature and may not be suitable for all audiences.