It could mean that the person is saying goodbye to writing or reading Naruto fanfiction. Maybe they've lost interest in the Naruto fandom, or perhaps they're moving on to other forms of writing or hobbies.
It could mean that someone views the 'Naruto' story as having elements that are characteristic of fan - created fiction. Maybe they think some parts of the plot or characters seem like they could be the result of fan creativity rather than strictly original creation.
Well, 'goodbye' is a simple parting word. 'Isekai' refers to the genre where characters are sent to a different world, and 'tensei' often means reincarnation in these stories. So perhaps it's someone's statement of giving up on reading or writing such novels. It might be that they've read too many and found them too formulaic or they just have a change in their reading preferences.
It could mean that someone is ending a romantic relationship or a period of time filled with love. Maybe they have had a relationship that has come to an end, and they are saying farewell to all the memories, experiences, and emotions associated with that love story.
Well, 'naruto slays fanfic' might imply that Naruto, the character from the Naruto series, has some sort of dominant or victorious role within a particular fanfic. Maybe he overcomes challenges in a really cool way that makes the fanfic stand out. For example, he could slay powerful foes or solve complex problems that are unique to the fan - made narrative.
It could mean that Naruto has a large number of fan - created fictional works. Fanfic, short for fan fiction, refers to stories written by fans based on the Naruto universe, and 'huge' implies there are a great quantity of such works.
It could mean that Naruto, as a character, inspires the creation of fan fiction. In the Naruto fandom, fans are so passionate about the story and characters that Naruto's adventures, his growth, and his relationships might give fans ideas to write their own fictional stories, which we call fanfic.
It could mean that the Naruto series somehow ruins or has a negative impact on fan - created fictional works (fanfics). Maybe Naruto's official plot developments or revelations make certain fan - made stories seem less original or interesting.
Well, if 'idoit' is a misspelling of 'idiot', it might be a fan - made story where the author portrays Naruto as an idiot. But it could also be just a very strange or ungrammatical title for a fanfic that has some unique take on Naruto's character that the writer thinks makes him seem foolish.
It might imply that in this fanfic, Naruto's typical heroic or central role is diminished. For example, if the fanfic is set in an alternate universe, there could be powers or events that make Naruto seem less significant compared to what we know from the original series. It could also be that the author of the fanfic wants to explore other aspects of the Naruto world and in doing so, Naruto doesn't get as much attention as he usually does.
I'm not entirely sure what 'naruto is a prize fanfic' specifically means. It could potentially refer to a Naruto - related fan - made story that has won a prize. But without more context, it's hard to be certain.