https://www.mangago.zone/read-manga/crossing_the_line_1/ (rlly smutty tho)
https://www.mangago.zone/read-manga/you_and_i_can_t_do_this/
https://www.mangago.zone/read-manga/unmei_no_tsugai_ga_omae_da_nante/
I think that's as far as I can give you. It's kinda hard to think of stories w this plot bc most "enemies to lovers" here are extremely one sided or they're just academically competitive w eachother
Read any but Never Understand from this list, its very shitty imo
https://www.mangago.zone/home/mangalist/2465819/
not rivals or anything, but enemies like they want each other dead
any recommendations?? bl or shoujo, either is fiinnneee