Until 23:59 PM on June 27th, fans can watch a special video on GYAO that shows some of the recording of the 15th anniversary of GO!!!, including Kiiyan and other seiyuu in the studio. The single will include the recording’s “making of” video as an extra.
There’s also a message from Kiiyan to the guys of FLOW on their 15th anniversary special web site.
GYAO video: https://gyao.yahoo.co.jp/player/00100/v08970/v0993900000000548780/
FLOW 15th anniversary site: http://www.flow.mu/cam/15th/