Board Thread:Questions and Answers/@comment-63.229.128.161-20130326163525/@comment-4631119-20130327035238

According to what I've read and how the anime progressed, I guess there will be almost no chance for second season, unless the Novel author can release considerable (around three or more) volumes within a year.

Almost 70% of the released stories are covered by the Anime, and the rest uncovered one just sidestory about Rita-Ryuunosuke, and the lives of "new" Sakurasou resident, including Himemiya Iori, Kanna Hase, Kanda Yuuko and Mitaka Misaki :)