What's isekai?
Basically a fantasy world...
Google Definition
Isekai is a genre of light novels, manga, anime and video games that revolve around a person who is transported to and has to survive in another world, such as a fantasy world, virtual world or parallel universe. This plot device allows the audience to learn about the new world at the same pace as the protagonist.
http://www.mangago.me/read-manga/will_you_marry_me_again_if_you_are_reborn/
http://www.mangago.me/read-manga/live_or_not/
http://www.mangago.me/read-manga/honey_lemon_soda/
http://www.mangago.me/read-manga/this_witch_of_mine/
http://www.mangago.me/read-manga/july_found_by_chance/
http://www.mangago.me/tag/strong+female+lead/
From the ancient dictionary of the Manga gods, isekai is simply the transportation of the mc to another world. It is subjugated under the fantasy genre
Not isekai but over 100 ch http://www.mangago.me/read-manga/akagami_no_shirayukihime/
Can someone recommend me good and LONG shoujo manga. It would be awesome if its isekai. I am just tired of mangas with 2-3 chapter╥﹏╥