His peace and quiet has been achieved, but to the extreme.  Everybody is gone, everybody on the earth!
Mahiro-san, didn't I try hard, too?
¡Mahiro-san, yo también me 
esforcé mucho, ¿verdad?!
¡Mahiro-san, yo también me he esforzado mucho, ¿verdad?!
Mahiro-san, eu também me esforcei muito, né?