Yuukarin has a late-night radio talk show. Cirno is her co-host, who never talks but only writes things in her notebook and laughs.
Meanwhile, the Moriya shrine gang are getting shitfaced at Mystia's, and making inappropriate suggestions to their waitress.
http://www.pixiv.net/member_illust.php?id=32143&tag=FM%E3%82%86%E3%81%86%E3%81%8B%E3%82%8A%E3%82%93
