no idea, but this are my recs. i'll come back if i find some more (or the manhwa your looking for)!
https://www.mangago.zone/read-manga/devouring_the_goose_dad_next_door/ gang bang extra 1-3 i'm pretty sure
https://www.mangago.zone/read-manga/the_black_iron_inn_a_story_of_a_swordsman_who_becomes_a_sex_slave/ gang bang as well
https://www.mangago.zone/read-manga/black_iron_inn_epilogue/ another gang bang but its not really shown
https://myreadingmanga.info/schweinchen-31-complete-degradation-3-eng/ not a gang bang but a 3some tw for scat near the end (it's not thaaaat bad)
https://myreadingmanga.info/peroi-nuru-a-penchant-for-puke-eng/ another 3some tw for vomit like literally vomit every panel
https://www.mangago.zone/read-manga/dr_v_and_the_three_lovers/ 3some + 4some in the most recent chapters
https://myreadingmanga.info/schweinchen-31-complete-degradation-4-eng/ another one by schweinchen
just looking for something i can goon with. any recommendation? i would like something thats Gang bang.
also anyone knows the title about a manhwa about a king thats very sexually active and is like a bad king that he gets beheaded in all life times? like he gets rape as well. its yaoi btw