Kokoro/Kokoro・Kiseki

==Kokoro==
===Male Covers===
===Female Covers===
===Other Covers===
==Kokoro・Kiseki==
The prologue to Kokoro that is sung by Kagamine Len, told from the point of view of the scientist.
===Male Covers===
===Female Covers===
===Other Covers===
==Kokoro x Kokoro Kiseki==
===Other Covers===