The original manga series has six volumes to its name so far.
The anime adaptation of SankakuHead’s manga series was directed by Masahiko Ohta based on the scripts by Takashi Aoshima along with character designs by Aya Takano and was done at Dogakoba.
The ninth volume of the Himouto! Umaru-chan manga has landed in Japan today and it comes with the news of more anime coming.