Remember the guy who did this article?
http://blog-project.net/special-translations/153854 He just tweeted that he's going to publish a special interview with Riho and Zukki soon:
モーニング娘。鞘師里保&鈴木香音インタビュー掲載決定!15才コンビの2年9ヶ月……そこにあった葛藤と夢。彼女の側だと素顔になれる15才と、純朴に彼女を敬愛する15才のリアル・アイドルストーリー。近日公開予定です
Translation: An interview for Morning Musume's Sayashi Riho and Suzuki Kanon will be released soon! The 2 years and 9 months of this 15 year old combination...the troubles and dream-like times during that period. The real idol story of the 15 year old girl who can show her true self only next to the other, and the other 15 year old who simply loves and respects her. To be officially published soon.
Pretty sure the first one is talking about Riho and the latter is Zukki.
SayaSuzuuuuuuu <3