Responses

http://www.mangago.zone/read-manga/hana_to_ryuu/
http://www.mangago.zone/read-manga/skin_asada_nemui/
http://www.mangago.zone/read-manga/innocent_blue/
If you want smut, djs would be more suitable e.g.
http://www.mangago.zone/read-manga/gintama_dj_get_me_out/
http://www.mangago.zone/read-manga/traumatic_phantasm/ (not a dj, but still smut)
Or visit myreadingmanga for more ^^

https://myreadingmanga.info/tag/gangrape/
have your pick :)
Do you know a yaoi manga where the uke or the seme got gang or just raped? ⁄(⁄ ⁄·⁄ω⁄·⁄ ⁄)⁄