
Quick answer — Dempagumi.inc worked on The Disastrous Life of Saiki K. Season 2 (Theme Song Performance), The Disastrous Life of Saiki K. (Theme Song Performance), The Disastrous Life of Saiki K. Season 3 (Theme Song Performance) and 1 more anime.
Dempagumi.inc worked on The Disastrous Life of Saiki K. Season 2 (Theme Song Performance), The Disastrous Life of Saiki K. (Theme Song Performance), The Disastrous Life of Saiki K. Season 3 (Theme Song Performance), Baby Princess 3D Paradise 0 [Love] (Theme Song Performance).