Seraph of the End - Season 1 - Eps 5: Black Demon's Contract
Wary of the Human Army's rise to power, Krul calls the vampires to war against them, while Yūichirō and his friends are finally selected to attempt to claim a demon weapon for themselves, despite knowing the risks.
About Seraph of the End

Title: Seraph of the End
First Air Date: 2015-04-04
Last Air Date: 2015-12-26
Status: Ended
Rating: 7.9/10 (from 414 votes)
Language: JA
Seasons: 3
Total Episodes: 24
Network: Tokyo MX
Genres: Animation, Action & Adventure, Sci-Fi & Fantasy
Production Companies: WIT STUDIO
Synopsis
After a mysterious virus wipes out ninety percent of humanity, vampires emerge from the recesses of the earth to enslave mankind, treating them like livestock. After growing tired of donating blood in exchange for protection, 12-year-old Yuichiro Hyakuya and his best friend Mikaela Hyakuya plot an escape along with the other orphans. After being the only successful runaway, Yuichiro joins the Moon Demon Company, an extermination unit of the Japanese Imperial Demon Army dedicated to killing off vampires.
Cast

Miyu Irino
Yuichiro Hyakuya (voice)

Kensho Ono
Mikaela Hyakuya (voice)

Yuichi Nakamura
Guren Ichinose (voice)

Takahiro Sakurai
Ferid Bathory (voice)

Saori Hayami
Shinoa Hiragi (voice)

Nobuhiko Okamoto
Yoichi Saotome (voice)

Kaito Ishikawa
Shiho Kimizuki (voice)

Yuka Iguchi
Mitsuba Sangu (voice)

Aoi Yuuki
Krul Tepes (voice)

Tatsuhisa Suzuki
Shin'ya Hiragi (voice)