The Show by Rock franchise has announced an musical event this fall featuring several of the main seiyuu, including Kiiyan. Pony Canyon’s info on the event says there will be two big announcements made during the event.
Event: 「SHOW BY ROCK!!」3969 GRATEFUL ROCK FESTIVAL
Venue: Olympus Hall (Hachioji)
Guests: Inagawa Eri, Taniyama Kishou, Hidaka Rina, Noguchi Ruriko, Kobayashi Yusuke, Kouno Marika, others to be named later
Lottery: There are two lotteries: a general lottery (6/23~9/30/2019) & a lottery for those who buy the full blu-ray set (8/21~9/17/2019). The second lottery has higher priority than the general lottery.
For more info, see the event website.
A September event has been announced with both Kiiyan and Granrodeo as guests!
Venue: Hachioji Olympus Hall
Guests：Uemura Yuuto, Miyano Mamoru, Toyonaga Toshiyuki, Kagura Hiroyuki, Kiiyan, Granrodeo
No word yet on how and when ticket sales will happen.