気まぐれメルシィ (Kimagure Mercy)

Background
"Kimagure Mercy" is an original Japanese song by Hachiouji-P featuring Hatsune Miku. The song is featured in the albun Eight -THE BEST OF Hachioji-P-, Hachiouji-P's ninth album. It tells the story of a girl who is sick of dealing with a man who is shallow, and only interested in her when he wants something from her. After listening to his constant excuses, she finally has enough with the disinterest he has in her, and leaves him.

This song has entered the Hall of Fame.