이(this)곡(song=노래)은(topic marker) 애니메이션(anime)이(subject marker) 끝난(ended) 지금(now)이기에(because of being=지금이기 때문에) (할 수 있는that you can do) 곡(song)이라(reported speech ending for 이다 'be' verb)는(adjective form) 느낌(feeling, thinking)입니다. ---It is my feeling(opinion) that this song is available now (=you can sing this song finally) because the anime ended just now.