Ao no ekusoshisuto Gufu (2011–2012) Online
Rin is undergoing training so that he can learn to master his demonic flames. Just then, a giant bird-like demon called Gufu swoops in on him! With Yukio's help, he drives it away, but all of the Cram School members are sent to investigate how the demon infiltrated the academy... Suguro and the others are still investigating when Konekomaru appears, begging for help, with Rin in pursuit. According to Rin, Konekomaru's been possessed by a demon, but no one else can see it. Suguro, mistakenly believing that Rin is attacking Konekomaru, turns on him with hostility!
| Episode credited cast: | |||
 | Jun Fukuyama | - | Yukio Okumura (voice) |
 | Kana Hanazawa | - | Shiemi Moriyama (voice) |
| Kazuya Nakai | - | Ryuuji Suguro (voice) |
| Nobuhiko Okamoto | - | Rin Okumura (voice) |
| Eri Kitamura | - | Izumo Kamiki (voice) |
 | Hiroshi Kamiya | - | Mephisto Pheles (voice) |
| Kôji Yusa | - | Renzou Shima (voice) |
| Rina Satô | - | Shura Kirigakure (voice) (as Rina Satou) |
 | Yûki Kaji | - | Konekomaru Miwa (voice) |
| Rest of cast listed alphabetically: | |||
 | Brian Beacock | - | Renzou Shima (voice) |
 | Johnny Yong Bosch | - | Yukio Okumura (voice) |
| Kira Buckland | - | Izumo Kamiki (voice) |
 | Christine Marie Cabanos | - | Shiemi Moriyama (voice) |
| Tobias Diakow | - | Yukio Okumura (voice) |
 | Doug Erholtz | - | Kaoru Tsubaki (voice) |
Gufu - An intermediate demon in the form of a bird. Fond of the dark side of the human soul.