Threesome route? how did u get that path??
It's been a while since you posted this comment, but Imma respond anyway.
Spoilers ahead.
Basically, you need to go through Kol's route... But never fuck him
Ever.
When he wants to take a shower together, say "no, thanks". Any other times, too. Then Nasir will ask if you guys have fucked at one point and Kol will say that not yet. And THEN Nasir will ask if you're even INTERESTED in fucking Kol. Here, you have three options.
"Of course I am!"
"Yes.... but...."
"No."
Here, if you want the threesome route, pick "Yes... But...." and watch the story unfold. Trust me XDXD
Anyway, if you pick "No", you get another ending where you get thrown out of the airlock, lololol.
Hope this helps, if you even read it, haha.