The official Corda account is running a 2ff twitter campaign through October 12th, giving away autographs from the main seiyuu. To win, follow the account (corda_official) and retweet it during the campaign period. Each week features different seiyuu. Kiiyan, Fukuyama Jun and Konishi Katsuyuki are featured the fourth week of the campaign.
Event: Twitter campaign
Prize: Kiiyan’s autograph
Dates: September 29-October 5, 2017
UR: http://www.gamecity.ne.jp/corda2ff/campaign.html & https://twitter.com/corda_official