You should read that beautiful “rainbow city” in your want to reads
Little mushroom
Breaking through the clouds 2: swallow the sea
https://www.mangago.zone/read-manga/escape_ray/
https://www.mangago.zone/read-manga/the_promise/
https://www.mangago.zone/read-manga/park_hanhoo_s_manager/
https://www.mangago.zone/read-manga/kill_the_lights/
https://www.mangago.zone/read-manga/again_1/
https://www.mangago.zone/read-manga/the_art_of_taming_a_tiger/
https://www.mangago.zone/read-manga/i_became_the_lousy_side_top_official/
READ ETERNAL COVENANT, KING'S MAKER, AND LITTLE MUSHROOM
Please rec some good BL/action/isekai, any length is fine so long as it's complete. I've read most of the popular stuff so something that isn't always front page would be nice.