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Uploaded March 5, 2015, with 77,100+ Niconico views and 1,670,000+ YouTube views
Though the meaning behind "Crystalline" is open to interpretation, the most common idea is that the lyrics are told from a first person point of view of a girl who is a victim of domestic abuse. She chooses by the end of the story to escape the one behind her abuse. However, other theories tell that she has an addiction to drugs (crystal meth) and realizes that for her own sake she has to break her habit.