Hints have been floating around, but a countdown on the official website for the Nyarko-san: Another Crawling Chaos anime has officially confirmed that a second season is on the way.
Nyarko-san is based on the light novels by Manta Aisora, and the first season of the anime adaptation streamed on Crunchyroll. As a bonus to the confirmation of season two, a few members of the show’s voice cast contributed some videos to share in the excitement. You can check them out under the image from the official site below, though keep in mind they’re all in Japanese with no subs. The embedded clip features Nyarko’s voice actress, Kana Asumi.
Additional confirmations come from Eri Kitamura (voice of Mahiro Yasaka), Miyu Matsuku (voice of Ku-ko), and Yuka Ōtsubo (voice of Tamao Kurei).
Source [Moe Ota-News Sokuhō via Crunchyroll]