Quick answer — Tatsuhiko Saiki worked on Aggretsuko: We Wish You A Metal Christmas (Music), Endo and Kobayashi Live! The Latest on Tsundere Villainess Lieselotte (Music), Girlfriend, Girlfriend Season 2 (Music) and 5 more anime.
Tatsuhiko Saiki worked on Aggretsuko: We Wish You A Metal Christmas (Music), Endo and Kobayashi Live! The Latest on Tsundere Villainess Lieselotte (Music), Girlfriend, Girlfriend Season 2 (Music), The Most Heretical Last Boss Queen: From Villainess to Savior (Music), The Most Heretical Last Boss Queen: From Villainess to Savior Season 2 (Music), Good Bye, Dragon Life (Music), My Instant Death Ability is Overpowered (Music), The Dawn of the Witch (Music).