A few 'isekai tensei harem novel' titles are 'Sword Art Online'. In the ALO and other arcs, Kirito has interactions with multiple female characters that have some harem - like qualities. And 'Log Horizon' is also relevant. Shiroe, the main character, is in a world full of different races and characters, and he has relationships with several that can be seen in the context of a harem in the isekai setting.
Well, 'The Rising of the Shield Hero' can be considered. The protagonist is summoned to another world, which is a typical isekai tensei situation. And he has a group of female companions who support him in different ways, which gives it some harem - like vibes. Also, 'Konosuba: God's Blessing on This Wonderful World!' is very popular. The main character is sent to a fantasy world (isekai) and he has a group of girls around him, which is a classic harem setup in light novels.
One popular 'isekai harem novel' is 'No Game No Life'. In this story, the two main characters are transported to a different world filled with games and rules. They encounter various female characters, and a harem - like dynamic develops as these characters are drawn to the protagonists' intelligence and unique abilities.
There's also 'Sword Art Online' which, while not strictly a traditional 'isekai tensei no boukensha' in the purest sense, has elements of being transported to a different virtual world that can be considered in a similar vein. It's very well - known for its action - packed battles and interesting character relationships.
Some popular ones might include 'Isekai Onsen ni Tensei: My New Life as a Hot Spring Owner'. It's a common concept where the protagonist is reincarnated in an isekai world related to hot springs and has various adventures.
One popular title could be 'In Another World's Labyrinth, My Harem Awaits'.
The appeal of 'isekai tensei harem novel' lies in the combination of two popular genres. The isekai aspect allows readers to escape into a different world, often filled with magic, adventure, and unknown. The harem part adds an element of romance and relationship dynamics. For example, in many such novels, the protagonist, who is usually a normal person reincarnated in a new world, gets to interact with multiple attractive characters of the opposite sex. This creates interesting storylines full of jealousy, friendship, and love triangles.
One popular 'isekai revenge novel' is 'The Rising of the Shield Hero'. In this novel, the main character is summoned to another world as one of the Four Cardinal Heroes but is betrayed and has to seek revenge. Another is 'Arifureta: From Commonplace to World's Strongest'. The protagonist is bullied and thrown into a dangerous labyrinth, and he embarks on a journey of revenge and self - improvement.
One popular 'isekai bl novel' is 'Kiss Me at the Stroke of Midnight in Another World'. It combines the allure of the isekai genre with a romantic BL storyline. The characters are well - developed, and the world - building is interesting.
Some well - known ones could be 'My Yankee Girl in Another World'.
There's also 'No Game No Life'. The siblings in this novel possess extraordinary intelligence and gaming skills that give them an unfair advantage in the isekai world they are transported to, which is very much like having cheats.