Common isekai stories typically follow a set formula. There's the sudden transfer to a different world, often accompanied by a truck-kun moment (where the character is hit by a truck and wakes up in another world). Then, there's the discovery of new powers or skills, making friends or allies, and usually a grand quest to save the new world or achieve something great.
One common trope is the overpowered protagonist. In many isekai game stories, the main character often has some special abilities or knowledge from their original world that gives them an edge in the new isekai world. Another is the harem aspect, where the protagonist is surrounded by multiple characters of the opposite sex who are attracted to them. Also, the concept of leveling up and getting stronger is very prevalent, as the character has to adapt to the new and often dangerous environment of the isekai world.
One reason could be the marketing. Maybe it didn't get as much promotion as other popular isekai novels. Without proper marketing, it's hard for a book to reach a wide audience, even if it has good content.
Well, a common isekai novel usually has a few typical elements. For example, the protagonist is often transported from our normal world to a fantasy world, either by being reincarnated or some kind of magical accident. There's often a system in place that gives the protagonist special abilities or quests to complete. Also, there's usually a power - up journey where the main character gets stronger over time.
A big trope is the 'fish out of water' situation. The character from the real world has to adapt to the strange rules and customs of the isekai world. Also, there's the 'chosen one' trope. The protagonist is somehow destined to save the isekai world or fulfill a great prophecy. And let's not forget the 'gaining levels' or 'power progression' trope, where the character gets stronger as they complete tasks or defeat enemies.
One common theme is self - discovery. The characters are often thrown into a new world and have to figure out who they are and what they want in this new life. For example, in 'Ascendance of a Bookworm', the main character discovers her love for books anew in the isekai world.
One common theme is the idea of starting anew. The protagonist often gets transported to a different world where they can leave behind their old problems or limitations. For example, in many isekai stories, a character who was a loser in their original world becomes a hero in the new one. Another theme is exploration. The new world in isekai fiction is full of unknowns, like strange creatures, new magic systems, and different cultures. Also, power - up is a big theme. The main character usually gains special abilities or powers during their adventures in the isekai world.
One element could be the setting. For example, instead of the typical fantasy world, it could be set in a post - apocalyptic isekai world where the protagonist has to deal with both the new world's magic and the remnants of a destroyed civilization. Another aspect could be the protagonist's unique ability. Most isekai protagonists have common powers like magic or super strength, but if the protagonist has an ability that's not often seen, like the power to control time in a very limited and strange way, it would make the story less common. Also, the way the story deals with the concept of 'returning' can be different. In a common isekai, the protagonist may not think about returning at all, but if the whole plot revolves around the protagonist's struggle between staying in the new world and finding a way back to the old one, it would stand out.
Betrayal is a very common theme. Usually, the protagonist is betrayed in their original world or in the isekai world they are transported to, which then triggers their desire for revenge.
One common theme is the fish - out - of - water experience. The main character is suddenly in a new world and has to adapt, which often leads to interesting romantic encounters. For example, they might be confused by the different social norms regarding courtship in the isekai world. Another theme is the power of love to change destinies. In many novels, the character's love for someone else gives them the motivation to overcome obstacles in the new world.