5-toubun no Hanayome: Special 1

Is this the new series ？or just some OVA thing

https://www.ganjingworld.com/video/1g2iivdk27d27LEsKuPaag4cs12p1c

TVスペシャルアニメーション「五等分の花嫁∽」本予告動画Gan Jing World