At the beginning of the music video, Miku was trying to search for the exit of the 'system' she was in before being deleted. She wanted to save herself but she couldn't, she wanted to be deleted but she also didn't want to leave this world, she wanted her owner to be happy. In one part of the song she says "Please, my owner, put an end to this, because I don't want to see your sad face all my life..."
Miku also felt sorry about her fans. In another part of the song, she mentions this "I didn't want to leave just like that, so I make this fast goodbye song" and then the second fast part of the song starts.
In some parts of the music, you might hear Miku screams, after she screams she says fast "EMERGENCY POWER OFF NEEDED".