Zerg: After being rescued by the Major General, I pledged myself to him.

[Two male protagonists + Zerg + dominant male lead + time travel + interstellar]
Yan Mo travels to the interstellar era, where technology is highly advanced and the universe has been conquered. However, the "people" here are not human; they call themselves the Zerg.
In the Zerg race, males are superior to females, and Yan Mo was mistaken for a male Zergling, so he could only tremble and cover his little vest.
Left with no other choice, Yan Mo had to become partners with Major General Lan Ze, who had saved him.
One day, he suddenly underwent a second differentiation.
Yan Mo: ...I never thought I would actually become a male insect.
Looking at the aloof major general in front of him, whose face was flushed red from the influence of his pheromones.
Yan Mo: ...Never mind, it's not so bad.