I'm not entirely sure specifically what 'hatsukoi visual novel' is about as there could be many with that name. Generally, a visual novel often involves a story with characters, dialogue, and choices. It might be about a first love ('hatsukoi' in Japanese) story, perhaps with different plotlines depending on the player's decisions in the game.
Since I don't have detailed information on 'tenseishichatta yo iya gomen light novel', it's difficult to say precisely. It might be set in a unique world with its own set of rules and characters. Maybe it involves a character who has made a mistake (iya gomen could imply regret) and is now in a tense situation (tenseishichatta yo).
In visual novels, 'be' is short for bad ending which is an important aspect. It gives a different flavor to the overall narrative experience. A 'be' can shock the player, make them sad or disappointed, but also makes the story more memorable. Regarding 'ne', I'm not really sure. It could be a unique term in some indie visual novels or a local jargon within a specific community of visual novel enthusiasts. It might also be a typing error where someone meant to type something else like 'new' or 'net' in relation to the visual novel's online or updated content.
I'm not entirely sure what specific fanfiction you're looking for with this title. It could potentially be a story where the energetic Naruto dance is somehow combined with the unique style of 2NE1 in a fictional scenario. Maybe it's about a character from Naruto who is a huge 2NE1 fan and starts doing their own version of the Naruto dance inspired by 2NE1's music.
The theme of self - discovery is often present. As the characters fall in love for the first time, they start to learn more about themselves. They might discover new aspects of their personalities, their strengths and weaknesses. Also, loyalty is a theme, loyalty to their village, to their friends, and how that loyalty impacts their love relationships in the context of the Naruto world.
Sekaiichi Hatsukoi is a light novel that mainly focuses on the relationships in the world of boys - love manga publishing. It tells the love stories and the development of relationships among the characters involved in this unique industry.
I'm not sure about the unique features of 'hatsukoi visual novel' without more information. But some visual novels have unique art styles that set them apart. It could be that this one has a distinct way of portraying the characters or the setting related to the first - love theme.
I'm not sure specifically as I haven't read it in detail. But generally, Sekaiichi Hatsukoi is often about romantic relationships, so this new novel might also focus on love stories, perhaps with new characters or new twists on the concept of first love.