I'm not sure specifically as 'hentai' involves adult and inappropriate content. However, if we consider just the 'fate' part in general, 'Fate' series often involve complex stories about battles, magic, and the fates of different characters in a fictional and often fantastical setting.
Often, such sites face legal actions and get taken down. Maybe that's what happened to this one. It's important to note that these kinds of sites are usually not in line with proper online behavior and regulations.
Well, the Fate/stay night: Unlimited Blade Works anime is a great non - hentai version. It showcases the battles, the strategies of the Masters and Servants in the Holy Grail War, and the development of the main characters like Shirou Emiya and Rin Tohsaka. Another one is Fate/stay night: Heaven's Feel, which also presents the story in a non - explicit way, delving deep into the mystery and drama of the Grail War. These versions are accessible to a wider audience.
The combination of Naruto and Irisviel in a harem setting is quite unique. Naruto is from a world of ninjas with his own set of values and powers, while Irisviel is from a different fictional universe with her own charm. In a harem fanfic, it allows for an interesting blend of different cultures and power systems. It can create new and unexpected storylines.
Well, there might be some out there. You can try looking on fanfiction websites like FanFiction.net or Archive of Our Own. Just search for 'naruto irisviel harem' and you might find some interesting reads. However, the quality can vary greatly from one story to another.
One possible plot could be that Irisviel summons Archer Shirou in a world where Arturia already exists. Maybe Irisviel has a specific plan to use Archer's abilities to help Arturia in some great battle or quest. Archer might initially be reluctant to work with Arturia due to their past differences, but as the story progresses, they start to understand each other better and form a strong alliance.
Archer and Arturia would likely start off with a bit of friction. Archer, being from a different time and having his own set of beliefs, might clash with Arturia's more traditional knightly values. However, as they face challenges together, they would gradually learn to respect each other. Irisviel would be the mediator, guiding their interactions and making sure they stay focused on the task at hand.