Quest: Beyond the Great Wall
Current
Yugiri: Indeed. They have built a new home for themselves, and no longer need me to shepherd them. The time has come for Gosetsu and I to return to our master─to our home.
Correction
Gosetsu and me
Reasoning
The rule of thumb is that if either of the subjects is removed, the sentence should still work. "The time has come for I to return to our master."
Thank You :)