Charr has confirmed that this track was essentially a simple 4 hour project at first. Then over the course of 3 days, elements were gradually added to the track. The "vocals" heard in the track were made using a vocal synthesizer software known as "UTAU". The voicebanks used are Kasane Teto, Momone Momo and Rouka Azuma (as stated in the "inf.txt" file in the google drive linked in the description of the reru music video on youtube).

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