The OVA of Musaigen no Phantom World ( Myriad Colors Phantom World ) has gained a 'trailer' that accompanies the 7th DVD / Blu-ray volume of the anime , scheduled to be released on October 10th.
The animation is by Kyoto Animation , the direction is by Tatsuya Ishihara (The Melancholy of Haruhi Suzumiya, Sound! Euphonium) and the character design is by Kazumi Ikeda (Clannad, Kanon 2, Love).
OVA Musaigen no Phantom World 'Trailer':
Finally, the story takes place in the future, in a world born of human imagination. What humans call monsters appear, and they become known as "ghosts." The main character, Haruhiko Ichijo, is a student at Hosea Academy; his friend Mai Kawakami fights ghosts with the "Spirit of Five Elements" ability; Izumi Reina has the "Phantom Eater" ability; and Koito Minase fights ghosts alone.
Via: Official Website