Saioshi no Gikei o Mederu Tame, Nagaikishimasu!

Saioshi no Gikei o Mederu Tame, Nagaikishimasu!
First light novel volume cover
最推しの義兄を愛でるため、長生きします！
Genre
Novel series
Written byTenma Asahi
Published byAlphaPolis
Original runSeptember 25, 2021 – present
Light novel
Written byTenma Asahi
Illustrated byKazuaki
Published byAlphaPolis
Imprint
  • &arche Novels b (vol. 1–3)
  • &arche Novels (vol. 4–)
Original runNovember 20, 2022 – present
Volumes6
Manga
Written byTenma Asahi
Illustrated byAki Tsujimoto
Published byAlphaPolis
Imprint&arche Comics
Magazine&arche
Original runJanuary 25, 2024 – present
Volumes3
Anime television series
Directed byYūsuke Morishita
Written byIzumi Tezuka
Music by
  • YAMAAD
  • Almond
Studio
  • Imagica Infos
  • Imageworks Studio
Original networktvk
Original run January 6, 2026 – present
Episodes4

Saioshi no Gikei o Mederu Tame, Nagaikishimasu! (最推しの義兄を愛でるため、長生きします！; lit. 'In Order to Love My Most Beloved Brother-In-Law, I'll Live a Long Life!') is a Japanese light novel series written by Tenma Asahi and illustrated by Kazuaki. Originally published online since September 2021, AlphaPolis have published six volumes of the series since November 2022 under their &arche Novels b and &arche Novels imprints. A manga adaptation illustrated by Aki Tsujimoto began serialization online via AlphaPolis' &arche manga website in January 2024 and has been collected in three tankōbon volumes. A "light anime" television series adaptation produced by Imagica Infos and Imageworks Studio premiered in January 2026.

Plot

A young man who is reincarnated into the world of his favorite otome game as Alba, the sickly son of an impoverished noble family. Born with an illness that prevents him from using magic and leaves him with a short life expectancy, Alba is taken in by a powerful duke's family. There, he meets Orsis, the duke's son and his new stepbrother, who was Alba's favorite character in his previous life.

As Alba adjusts to his new circumstances, he recalls that in the original game's story, his own death plays a crucial role in Orsis's character development, robbing him of his smile. Determined to avoid this fate, Alba begins searching for ways to extend his life and evade the events that lead to his tragic end. While doting openly on Orsis, Alba works to change the future of the story, hoping to remain by his side and alter the destiny that binds them both.

Characters

Alba (アルバ, Aruba)
Voiced by: Ayumu Murase[2]
Orsis (オルシス, Orushisu)
Voiced by: Shouta Aoi[2]
Hals (ハルス, Harusu)
Voiced by: Reo Tatsumori[3]
Floro (フローロ, Furōro)
Voiced by: Maaya Torigoe[3]
Bruno (ブルーノ, Burūno)
Voiced by: Yūya Hirose[3]

Media

Light novel

Written by Tenma Asahi, Saioshi no Gikei o Mederu Tame, Nagaikishimasu! began serialization as a web novel published on AlphaPolis' website on September 25, 2021.[4] It later began publication with illustrations by Kazuaki under AlphaPolis' &arche Novels b (volumes 1–3) and &arche Novels (volume 4 onwards) light novel imprints on November 20, 2022. Six volumes have been released as of December 20, 2025.[5]

No. Release date ISBN
1November 20, 2022[6]978-4-434-31144-4
2May 20, 2023[7]978-4-434-32024-8
3November 15, 2023[8]978-4-434-32914-2
4May 20, 2024[9]978-4-434-33893-9
5January 20, 2025[10]978-4-434-35137-2
6December 20, 2025[5][11]978-4-434-36865-3
978-4-434-36864-6 (SE)

Manga

A manga adaptation illustrated by Aki Tsujimoto began serialization on AlphaPolis' &arche manga website on January 25, 2024.[12] The manga's chapters have been collected into three tankōbon volumes as of February 2026.[13]

No. Release date ISBN
1August 20, 2024[14]978-4-434-34324-7
2July 20, 2025[15]978-4-434-35912-5
3February 20, 2026[13]978-4-434-36469-3

Anime

A "light anime" television series adaptation was announced on June 30, 2025.[1] The series is produced by AnimationID under the boys' love label Balloon, animated by Imagica Infos and Imageworks Studio and directed by Yūsuke Morishita, with Izumi Tezuka handling series composition and YAMAAD and Almond composing the music.[16] It premiered on January 6, 2026, on tvk. The ending theme song is "Endless You" performed by Shouta Aoi.[3]

References

  1. ^ a b c Tai, Anita (June 30, 2025). "Boys-Love Light Anime Label Balloon Launches with TV Anime in 2026". Anime News Network. Retrieved October 12, 2025.
  2. ^ a b Hodgkins, Crystalyn (November 20, 2025). "'Saioshi no Gikei o Mederu Tame, Nagaikishimasu!' Light Anime Stars Ayumu Murase, Shōta Aoi". Anime News Network. Retrieved November 20, 2025.
  3. ^ a b c d Cayanan, Joanna (December 9, 2025). "'Saioshi no Gikei o Mederu Tame, Nagaikishimasu!' Light Anime's Promo Video Reveals More Cast, Staff, Ending Theme, January 3 Streaming Debut". Anime News Network. Retrieved December 9, 2025.
  4. ^ 最推しの義兄を愛でるため、長生きします！ (in Japanese). AlphaPolis. Retrieved October 12, 2025.
  5. ^ a b 最推しの義兄を愛でるため、長生きします！６ (in Japanese). AlphaPolis. Retrieved December 25, 2025.
  6. ^ 最推しの義兄を愛でるため、長生きします！ (in Japanese). AlphaPolis. Retrieved October 11, 2025.
  7. ^ 最推しの義兄を愛でるため、長生きします！２ (in Japanese). AlphaPolis. Retrieved October 11, 2025.
  8. ^ 最推しの義兄を愛でるため、長生きします！３ (in Japanese). AlphaPolis. Retrieved October 11, 2025.
  9. ^ 最推しの義兄を愛でるため、長生きします！４ (in Japanese). AlphaPolis. Retrieved October 11, 2025.
  10. ^ 最推しの義兄を愛でるため、長生きします！５ (in Japanese). AlphaPolis. Retrieved October 11, 2025.
  11. ^ 最推しの義兄を愛でるため、長生きします！６　特装版 (in Japanese). AlphaPolis. Retrieved December 25, 2025.
  12. ^ 最推しの義兄を愛でるため、長生きします！ (in Japanese). AlphaPolis. Retrieved October 12, 2025.
  13. ^ a b 最推しの義兄を愛でるため、長生きします！３ (in Japanese). AlphaPolis. Retrieved February 4, 2026.
  14. ^ 最推しの義兄を愛でるため、長生きします！１ (in Japanese). AlphaPolis. Retrieved October 11, 2025.
  15. ^ 最推しの義兄を愛でるため、長生きします！２ (in Japanese). AlphaPolis. Retrieved October 11, 2025.
  16. ^ Hodgkins, Crystalyn (October 9, 2025). "'Saioshi no Gikei o Mederu Tame, Nagaikishimasu!' Light Anime Debuts in January". Anime News Network. Retrieved October 12, 2025.
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