Often, they start with the character's death in their original world. For example, they might die in a car accident or some other sudden event.
Well, a common way is through a tragic event in the character's original life that leads to their death. After that, they are reincarnated. In some stories, the character might be a hardcore gamer who was playing a game right before dying, and then when they are reincarnated, the new world seems to have some similarities to the game they were playing. This connection between their past life as a gamer and the new world they are in is what drives the initial part of the story, as they start to figure out how to use their gamer knowledge to their advantage.
They usually begin with the protagonist's death and then a sort of transition. It could be like a bright light or a strange feeling, and then they find themselves reincarnated in a new world. Sometimes, they might even be given a choice or a mission right at the start of their reincarnation. And in many cases, they immediately realize they still have their gamer skills or knowledge which sets the stage for their new adventures.
Often, it starts with the OC's death in their original world. It could be a tragic accident or some kind of sacrifice. Then, they suddenly find themselves reincarnated as Ash. There might be a moment of confusion as they realize they are in a different body and a different world.
Often, they incorporate gamer mechanics through things like leveling systems. The SI character might gain experience points for defeating Grimm or completing quests, just like in a game. They could then use these points to level up their abilities, such as increasing their speed or strength.
Some Vampire Bite Fanfiction start with a backstory. For example, the vampire has a long - forgotten past that is somehow related to the human they are about to bite. Maybe they were lovers in a previous life, and the vampire's bite is a way to rekindle that connection. This gives depth to the story right from the beginning.
Often, graveyard horror stories start with someone entering the graveyard at night. Maybe it's a curious teenager who wants to explore the spooky place or a person who has to pass through it to get home. For example, a young man might take a shortcut through the graveyard on his way back from a party, not realizing what awaits him in the darkness.
Typically, it begins when there's a shift in the way they interact. They might start to get a bit jealous when the other person talks about dating someone else. It could also start with a simple compliment that makes one of them think, 'Hmm, there might be more here.' For instance, if a guy friend says to a girl friend, 'You look really beautiful today in that dress,' and she blushes and feels something special in that moment.
Often, it starts with a simple moment. Maybe a compliment that was a bit more than just friendly. For example, 'You look really beautiful today' in a tone that was different from the usual friendly banter.
Often, they start with a normal - seeming situation. For instance, a person finding an old object or moving into a new place. Like in 'Ben Drowned', it starts with someone getting an old Majora's Mask cartridge.
Often, they start with the introduction of the main character in their ordinary world. For example, in 'The Hobbit', we first meet Bilbo Baggins in his comfortable hobbit - hole. Then, something disrupts this ordinary life. It could be a message, a strange visitor, or a mysterious event. In 'The Lord of the Rings', it's Gandalf bringing news that sets Frodo on his quest.
Often, they start from a very close friendship. For example, two friends who have known each other for a long time might suddenly realize there's a physical attraction. One night, after a party where they were dancing closely, they might share a kiss and that could be the start.
Well, it can start with a simple glance or a friendly chat. Sometimes, it's a shared interest or a chance encounter that kicks things off.