Perhaps it's part of a battle scenario in the fanfiction. Sasuke could be under some sort of mind - control or dark influence. Biting Sakura's neck could be an act that shows his altered state. And Sakura's reaction to this could be a central part of the plot, whether she tries to fight back, understand what's wrong with him, or forgive him later.
I'm not sure specifically as I haven't read it. It could be a story about love that has some sort of 'biting' element in a metaphorical sense, like a passionate or intense love.
Their relationship could become more strained. Sakura might be afraid of Sasuke after the bite, creating distance between them. Sasuke, on the other hand, could be filled with regret and try to avoid her, which would further complicate their relationship.
It's a visual novel. Usually, it might be about relationships, perhaps with a touch of romance or drama. But without actually playing it, it's hard to say precisely.
It's likely about a vampire from the Argeneau family and some kind of love story that involves 'love bites'. Maybe it's about a romantic relationship between a human and an Argeneau vampire where the bites play a significant role, like in some vampire lore, bites can be a form of connection or claim in a relationship.
Since I'm not familiar with the exact details of 'love bites visual novel', it's difficult to say. Some visual novels are family - friendly, focusing only on innocent love stories and positive values. However, others may have more complex or adult - oriented themes. Without more information, we can't determine its suitability for all ages.
There's likely an Argeneau vampire who is a key character. This vampire might have some special traits or abilities within the context of the Argeneau vampire lore. The love interest is also a main character, and they could bring a different perspective, perhaps a more human or non - vampire view. And there may be an antagonist, perhaps another vampire or a force that opposes the relationship between the two main characters.
Love is likely a main theme, as the title implies. It probably explores the relationship between characters where one is a vampire, and how love develops in such a situation.