One is their 17th single “月光” (gekkou) that will be released on January 31.
(There’s a YT link with half of the MV in the tweet but it’s set to private still.)
They then announced several lives and posted a short promotion video for it. There aren’t any details in the video but I leave the link for who might be interested.
The actual dates can be found here.
There are still quite some details missing but for the first two and the last one out of seven dates they got listed.
The tour will be named 黒ノ巡礼 (kuro no junrei).
The last event of it will be a oneman show at Ikebukuro chop on June 6, the first two ones take place on March 4 (Shinjuku ANTIKNOCK) and March 27 (Higashi Koenji Niman Denatsu).