“Shiro Buta Kizoku desu ga Zense no Kioku ga Haeta node Hiyoko na Otouto Sodatemasu” Anime Premieres Online on April 20th Before July TV Debut

Sat Mar 29 2025

The official website for the Shiro Buta Kizoku desu ga Zense no Kioku ga Haeta node Hiyoko na Otouto Sodatemasu (Reincarnated as a Neglected Noble: Raising My Baby Brother With Memories From My Past Life) TV anime has revealed that the anime will premiere its first two episodes on the ABEMA steaming service in Japan on April 20th, 2025.

The anime was originally meant to premiere on Japanese TV in July 2025, but it will now debut on April 20th, 2025, on ABEMA before airing on TV in July 2025.

Shiro Buta Kizoku desu ga Zense no Kioku ga Haeta node Hiyoko na Otouto Sodatemasu Anime Visual

Sato Masafumi (Henjin no Salad Bowl) is directing the anime at Studio Comet, and the anime will star Kuno Misaki as Ageha and Ise Mariya as Regulus. Other cast members have been confirmed as:

  • Toyosaki Aki as Princess Hyakka
  • Murase Ayumu as Igor
  • Nanao Haruhi as Rottenmeyer
  • Nanami Hiroki as Laala
  • Yusa Kouji as Victor
  • Hikisaka Rie as Alice Utsunomiya
  • Toki Shunichi as Romanov

The anime is based on Yashiro’s Shiro Buta Kizoku desu ga Zense no Kioku ga Haeta node Hiyoko na Otouto Sodatemasu light novel series. Yashiro started the ongoing story in August 2018 on the Shousetsuka ni Narou website, and TO Books published the first novel in January 2020 with illustrations by Keepout (Isekai Yakkyoku, Chichi wa Eiyuu, Haha wa Seirei, Musume no Watashi wa Tenseisha). The latest novel, number 13, was released in January 2025.

Shiro Buta Kizoku desu ga Zense no Kioku ga Haeta node Hiyoko na Otouto Sodatemasu NOvel Cover 13

In a corner of the country, an obese child abandoned by his unfriendly parents lives Ageha, the eldest son of an earl’s family, who has memories of his past life as a Japanese man.  Ageha meets his half-brother Regulus and discovers that he will grow up to kill him over the right to inherit the title. He is taken by the sparkling, fluffy, and innocent Regulus… and before he knows it, he has become a doting parent (brother)! Ageha accepts his future and decides to raise his younger brother.

In order to hand over as much of the rich land as possible, Ageha takes reforms one step at a time, sometimes even involving the gods, in this fantasy about managing a territory by young brothers!

We’ve previously covered  Shiro Buta Kizoku desu ga Zense no Kioku ga Haeta node Hiyoko na Otouto Sodatemasu on NamiComi News, which you can read by visiting the relevant news article.

  • Keepout
  • Reincarnated as a Neglected Noble: Raising My Baby Brother With Memories From My Past Life
  • Sato Masafumi
  • Shiro Buta Kizoku desu ga Zense no Kioku ga Haeta node Hiyoko na Otouto Sodatemasu
  • Studio Comet
  • Yashiro

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