If injections turn you into invaders, and eating their flesh turns you into invaders, what happens if you sniff their fermented shit? Jenkem arc when?!
I feel like this is one of those stories where the MC never gets with anyone until the very end and even then it'll be for a single panel or something similar.
It's been so long I re-read the first couple of chapters and wow, wtf happened? This used to be good then it got bogged down by the author's self closeted self insert and sudden tone shift.