This one's older yet I haven't posted the news yet. There's a game from CAPCOM called Monster Hunter Frontier or simply MHF wherein Okiayu-san took part in. This is the site link: http://www.mh-frontier.jp/contents/playmovie/#acter
From left to right: Hirohashi Ryou, Asano Masumi, Okiayu Ryoutaro, Tanaka Rie, and Shiraishi Ryouko
They have this somewhat seiyuu interaction in it. I can't fully stream the video though since my internet connection is not that fast and the quality is in SUPER HD!
If you're interested in the game I don't think you can play it if you're not good in reading and of course, understanding Japanese words. The graphics is really good (the images are the one I judged).
Until next post!