Looking for a yaoi/bl manhwa

Uhhh so it’s like really weird so bear with me please…
My friend described it to me during class and I don’t remember much but I think its about a foreigner who goes into a tribe or sum? I just remember there was a scene where the foreigner goes infront of a dark place, the mc said AND I QUOTE (actually prob not 100% correct dialogue but it was about flying underwears) “ahhh! Theres flying underwear coming at me!”. It was because the people of that tribe are dark skinned, that’s why he said that but uhm… If you know it than pls tell me!(⌒▽⌒)