Finally we have some details of this release. As mentioned, M is going to release new sinlge on December 8th! It is entitled as 「雛鳥」 (Hinadori) and costs 1,260 yen.
With the title song there will be also another track called 「感情のキャンバス」 (Kanjou no kyanbasu).
Source: Jishuban Club