This one is so good! Not similiar to rainboe city tho but maybe you can try it out
https://chrysanthemumgarden.com/novel-tl/sf/sf-1/ (for novel)
https://www.mangago.zone/read-manga/soul_fire/ (manhwa version)
"Little mushroom", if you haven't read that already. Its a post apocalyptic BL chinese manhua so no smut.
"Success Oriented Guide/Guide out to succeed", guideverse korean BL manhwa, it does have smut but it has a very good plot.
"Turning" !!!
https://novelbin.com/b/turning
Slowburn, crazy world-building, plot heavy, cute domestic moments, greenest flags.
Includes : OP mc and ml, regression, monsters gates, omegaverse. Unreliable narrator.
It subverts all those tropes it's amazing. For once the regressor doesn't know everything and is scarred by his past life; omegaverse is by no means used as a justification of rape, instead it's more of a side trope and they are fighting for omega's rights.
Slow-burning hard BUT it's because they are actually growing to know each other and becoming vulnerable. Good poetic smut too.
Seconding Little Mushroom.
AHHHHHHHHHH Sangyang:The Wanderer
Oh never mind it doesn’t have a novel
https://www.mangago.zone/read-manga/hikaru_ga_shinda_natsu/
https://www.mangago.zone/read-manga/dreadful_night/
Not novel... But, can read these 2 if u like thriller....
GLOBAL EXAMINATION!!! it has a novell too!!!
Mist is really good too
Its okay babes as long as it's good and wirth it ;D
Guys please recommend bl with good plot !!!and not just about sex and if it's similar to rainbow city or into the thrill like a good novel that was adapted into a manhwa ?