**"I'll Live Long to Adore My Favorite Stepbrother!"** is an isekai reincarnation boys' life based on the mega-popular light novel by Asahi Tenma-sensei.
Winner of the Readers' Award at Alpha Polis 9th BL Grand Prize in 2021, a trending work surpassing 170,000 copies in cumulative series circulation!
From January 2026, it's the commemorative first work of BL project "BALLOON," produced as "Light Anime" developed by Dai Nippon Printing.
A dream-like setting where the protagonist who spent heavily on a smartphone otome game in their previous life reincarnates and becomes the stepbrother of their favorite character!
A work packed with heartwarming wholesome fantasy and empathy for fan activities 💖
① Dream Setting Where Your "Oshi" Becomes Your Stepbrother
A shocking development where Orsis, the favorite character from the otome game loved in the previous life, becomes your stepbrother in this life!
Being able to become family with your oshi—the best reincarnation packed with every otaku's dream ✨
The happiness of being able to adore your oshi up close every day—you can't stop feeling excited along with Alba 💕
② Warm and Wholesome Family Love
Stepfather Hars, who was strict with his son at first, gradually awakens to family love under Alba's influence—it's the best!
Heartwarming to see the tense ducal family transform into a close-knit family 🏠
Heartwarming development where the whole family dotes on Alba!
③ Protagonist Who Faces Fate
Alba carries an incurable disease called "Raonen Disease" and bears a fate of short life.
However, his brave figure struggling with all his might to twist fate in order to continue adoring his oshi makes you want to cheer him on ⚔️
Guaranteed empathy with the strong motivation of "living long for your oshi"!
④ Stepbrother Who Evolves into a Doting Brother
As a result of continuously receiving pure love from Alba, Orsis evolves more and more into a doting brother—irresistible development!
Can't stop grinning watching the initially cool stepbrother being won over by Alba 😊
The process of deepening brotherly bonds is a must-see!
⑤ Luxurious Voice Actor Collaboration
Luxurious casting with Ayumu Murase as Alba and Shouta Aoi as Orsis!
Shouta Aoi also performs the ED theme "Endless You," coloring the work 🎵
A noteworthy work also featuring Yuya Hirose, Rerou Tatsumori, and Maaya Torigoe!
① Treatment of Alba's Disease "Raonen Disease"
"Raonen Disease" that Alba suffers from is a troublesome illness that prevents magic use and shortens lifespan.
The development of searching for medicinal herbs and treatments based on game memories is a highlight 💊
Also pay attention to genius boy Bruno's research efforts for Alba!
② Stepfather Hars's Reformation
Stepfather Hars was initially strict with heir Orsis.
As a result of Alba preaching for an hour each time about "how wonderful Orsis is," he fully awakens to family love 😂
It's funny watching him transform into a son-LOVE father!
③ Beyond the Game's Ending
In the original work, after breaking death flags and completing the engagement ceremony, they reach a future beyond the game's original ending.
Beyond the scenario's happy ending are days no one knows 📖
Looking forward to what happens when game knowledge no longer applies!
④ New Character Appearances
In the high academy arc, a mysterious second prince and a marquis's son who doesn't get along with Orsis appear.
Heart-pounding development as capture target characters approach Alba 💓
Orsis getting jealous of Alba's academy life is also a highlight!
⑤ New Adventure at the Royal Palace
There's also a development where Alba works at the royal palace where Orsis is during long vacation!
Getting involved in major incidents like Queen Mira's pregnancy and neighboring country's crisis 👑
Looking forward to healing developments with "welcome back hugs" and "super close fan service"!
① Reincarnation and Fateful Encounter
The protagonist, who was a heavy-spending gamer male in the previous life, reincarnates as Alba, son of poor nobility.
Taken in by the ducal family due to mother's remarriage, there he met Orsis, his favorite from the previous life!
The joy of "I became my oshi's stepbrother!" was short-lived when realizing he's the cause of losing his stepbrother's smile 😢
② Resolve to Change Fate
Alba cannot use magic due to "Raonen Disease" and bears a fate of short life.
He begins searching for ways to live long to protect his stepbrother's smile and continue adoring his oshi 💪
Days of searching for herbs, reforming stepfather, and constantly praising stepbrother begin!
③ Deepening Family Bonds
Through Alba's desperate efforts, the tense ducal family transforms into a loving family.
Stepfather Hars comes to dote on his sons and wife, and Orsis evolves into a doting brother 🏠
They become known as a famously close-knit family!
④ Overcoming Illness and Engagement
Relying on game memories, Alba recalls the route to find a specific medicine for the disease.
With genius boy Bruno's cooperation, the development finally leads to overcoming Raonen Disease 🌟
Breaking death flags and even completing the engagement ceremony with Orsis!
⑤ Enrollment in High Academy
Alba, having reached a future beyond the game's ending, enrolls in high academy.
He was looking forward to pilgrimage of his brother's sacred places, but new encounters and crises await 📚
Unexpected developments continue with a boy fighting Raonen Disease, dragons different from the game, and more!
⑥ Days at the Royal Palace
With Orsis graduating from high academy, Alba works at the royal palace during long vacation.
While getting involved in Queen Mira's pregnancy and neighboring country's crisis, he's enjoying his happy life with Orsis 💕
As a magic circle engineer and his brother's fiancé, Alba's adventure continues!
📺 TV Broadcast
🔹 tvk (TV Kanagawa)
From January 6, 2026 (Tue)
Every Tuesday at 21:55~ broadcast starts!
Those in Kanagawa area can enjoy on TV too 📺
🌐 Streaming Information
🔹 Prime Video【Fastest Early Streaming】
January 3, 2026 (Sat) 22:00~
Enjoy 3 days earlier than terrestrial broadcast!
Other streaming platforms will stream sequentially after terrestrial broadcast 🎬
📱 Streaming Platform List
├─ Prime Video (Fastest Early)
├─ d Anime Store
├─ U-NEXT
├─ ABEMA
├─ DMM TV
├─ FOD
├─ Anime Houdai
├─ TELASA
├─ Lemino
├─ Niconico
└─ And many more!
Watch on your preferred service 📱
🌟 Alba (CV: Ayumu Murase)
Son of poor nobility, reincarnated from a heavy-spending gamer in previous life.
Bears a troublesome disease called "Raonen Disease" and a fate of short life.
However, a protagonist who lives happily just by his oshi's existence—a model of fan activities!
His cute figure going "hauu!" and crouching while squirming every time he sees Orsis 💕
【Trivia】 The time Alba preaches to stepfather about how wonderful Orsis is has become a standard "easily an hour" each time 🕐