
Quick answer — SankakuHead worked on Himouto! Umaru-chan R (Original Creator), Himouto! Umaru-chan OVA (Original Creator), Himouto! Umaru-chan (Original Creator) and 1 more anime.
SankakuHead worked on Himouto! Umaru-chan R (Original Creator), Himouto! Umaru-chan OVA (Original Creator), Himouto! Umaru-chan (Original Creator), Himouto! Umaru-chanS (Original Creator).