The Seven Knights of the Marronnier Kingdom: New PV and Cast

"The Seven Knights of the Marronnier Kingdom" receives a second PV, new cast members, and yama's opening "Sayonara wa Iwanai". The TV anime premieres on NHK E-Tele on October 3, 2026; Prime Video releases the series worldwide exclusively for Prime members starting October 4 at 0 Japan time.

The new PV introduces the individual voices of the seven brothers for the first time. The opening "Sayonara wa Iwanai" can be heard in the second half. yama writes and composes the song together with Seiji Kameda, who also handles the arrangement and production.

Five more roles added to the cast

Newly confirmed are Miyuki Sakurai as Eleonora, Natsumi Fujiwara as Princess Brunhild, Takehito Koyasu as Elliot, Kazuyuki Okitsu as Hugo, and Daisuke Namikawa as Peregrinus. Anime!Anime! also reports that the series begins on October 3 on NHK E-Tele.

The anime adaptation is based on Nao Iwamoto's manga, which has been serialized in Shogakukan's "Monthly Flowers" since 2016. The story follows seven brothers from the Marronnier Kingdom who travel as envoys to seven neighboring countries. According to Amazon, eleven collected volumes were available as of September 7, 2026.

Kiyoko Sayama directs, and Shinzo Fujita is responsible for series composition and scripts. Yuriko Maeda designs the characters, and Yoshiaki Fujisawa composes the music. The animation is produced by J.C.STAFF.

October premiere and worldwide Prime Video release

In Japan, the first episode airs on October 3 at 6 PM on NHK E-Tele. Prime Video then begins its worldwide exclusive release on October 4 at 0 Japan time and continues with new episodes on Sundays.

The series is thus one of several new October titles receiving additional videos and cast details shortly before their premiere. Most recently, a new PV along with the cast was released for Tanuki to Kitsune. Prime Video is simultaneously expanding its anime lineup; Chainsaw Man – Reze Arc also premieres on Prime Video in September.