Original diary: tetsuya, posted on his mobile site tetsu-tetsu.com.
(Picture of the MAGIC BALL; a round air-freshner-type thing)
Sealed archive
The rest is in the vault.
JRock University's full texts and archived comments come with the compact.band Vault key. Indexes are free to browse.
Get the Vault key →Have one? Open the Vault, press "unlock the music school".