Thread:Juice Boxxed/@comment-28245851-20170824132651/@comment-28245851-20170824140243

It appears it comes from an event that was held in the Japanese department store Shibuya Marui with several other pieces of DR3 merch, including other clear files. (I'm personally fond that Mukuro one myself).

Japanese

Google Translated Page

Ergo, the acceptable file name would be "Juzo Sakakura and Kyosuke Munakata Clearfile from the DR3 Shibuya Marui Event.png".