The third season is confirmed for this
summer. Suwabe Junichi will be voicing Matoba. Of course, the rest of the cast remains the same.
On a not-so-unrelated note
(I'll admit I just can't be bothered to open the thread), the Hotarubi no Mori e movie will open this fall (
official website). Uchiyama Kouki and Sakura Ayane will be playing the leads.
Source: MATA-WEB (
1,
2)