Here are stories where the original's 2nd male lead is the love interest, their female partner is not the original's heroine though...
https://www.mangago.me/read-manga/i_m_the_wife_of_the_yandere_second_male_lead/
https://www.mangago.me/read-manga/it_s_been_a_while_since_the_original_novel_was_completed/
https://www.mangago.me/read-manga/for_my_abandoned_love/
https://www.mangago.me/read-manga/the_lady_s_butler/
https://www.mangago.me/read-manga/i_became_the_wife_of_the_monstrous_crown_prince/
https://www.mangago.me/read-manga/saving_the_villain_who_was_abandoned_by_the_female_lead/
https://www.mangago.me/read-manga/i_became_the_sister_of_the_time_limited_heroine/
https://www.mangago.me/read-manga/i_am_the_male_lead_s_ex_girlfriend/
https://www.mangago.me/read-manga/i_raised_an_obsessive_servant/
https://www.mangago.me/read-manga/reforming_my_regretful_husband/ 1st ml is not even in the picture (yet?)
https://www.mangago.me/read-manga/i_ended_up_raising_the_children_of_the_female_lead_and_male_lead/
Thank you so much!!!
You're welcome. Have fun reading ヾ(❀╹◡╹)ﾉ~
Can I have recommendations where the 2nd male Lead gets the girl? I’m tired of seeing them heartbroken I need happy endings where the fmc chooses them, similar to this one https://www.mangago.me/readmanga/futari_de_koi_wo_suru_riyuu/