Responses
You do see it in a flashback:
http://www.mangago.zone/read-manga/saezuru_tori_wa_habatakanai/mf/v01/c008/13/
However, the scene the OP references is not a rape. The uke willingly allows himself to be used by multiple men as a response to his childhood trauma. It is dark and psychologically complex handling of rape trauma, not like the rapemance in other yaois. Give it a try.

does the uke get rape?sorry i believe a long time ago i read some parts and i saw the Luke getting raped by bunch of guys but I'm not so sure is this one. I don't enjoy manga where the characters get raped y a bunch of people gives me the creeps so i just wanna make sure .
thanks for the help appreciated