The story in the Simulacrum is not going to be the only gay relationship in the game. Reamus can become involved with either Alen or Jymsar.
Pervader mainly revolves around the plot of Reamus' affliction, while romance is a B-plot. Much of the early game deals with learning about the world and getting to know Alen and Jymsar, before leaping into their intimate stories. After the next story update, there will be more direct romance signaling between Reamus and Alen/Jymsar.