This opera has three acts.
Kono kageki wa san maku kara naru.
this (something or someone close to the speaker (including the speaker), or ideas expressed by the speaker)
topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis
curtain; bunting; act (in play)
from (e.g. time, place, numerical quantity); since; from (originator); by; because; since; out of (constituent, part); through (e.g. window, vestibule); after; since
to become; to get; to grow; to be; to reach; to attain; to result in; to prove to be; to consist of; to be composed of; to succeed; to be complete; to change into; to be exchanged for; to play a role; to be promoted; to do ...