Last week, Kadokawa started streaming the TV ad of the upcoming 10th Haruhi Suzumiya light novel, The Surprise of Haruhi Suzumiya (Suzumiya Haruhi no Kyōgaku)! The said novel will be released in May 25th in all 13 countries where the light novel is being currently published.
The light novel is 600 pages long, so it will be shipped in two parts. Along with it, Kyon's side story which is set during his middle school years called, Rainy Day will be part of the novel.