Quick answer — Idea Factory worked on Hakuoki ~Demon of the Fleeting Blossom~ Record of the Jade Blood (Original Creator), Hakuoki ~Demon of the Fleeting Blossom~ Dawn of the Shinsengumi (Original Creator), Hakuoki ~Demon of the Fleeting Blossom~ (Original Creator) and 6 more anime.
Idea Factory worked on Hakuoki ~Demon of the Fleeting Blossom~ Record of the Jade Blood (Original Creator), Hakuoki ~Demon of the Fleeting Blossom~ Dawn of the Shinsengumi (Original Creator), Hakuoki ~Demon of the Fleeting Blossom~ (Original Creator), Hyperdimension Neptunia: The Eternity (True Ending) Promised (Original Creator), Hyperdimension Neptunia (Original Creator), Hiiro no Kakera: The Tamayori Princess Saga (Original Creator), Libra of Nil Admirari (Original Creator), Mars of Destruction (Original Creator) and 1 more.