I'll Live a Long Life to Dote on My Favorite Stepbrother!
Japanese light novel series
I'll Live a Long Life to Dote on My Favorite Stepbrother! (最推しの義兄を愛でるため、長生きします！, Saioshi no Gikei o Mederu Tame, Nagaikishimasu!; 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 aired from January to March 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.
The public source identifies “I'll Live a Long Life to Dote on My Favorite Stepbrother!” as japanese light novel series. This brief keeps that definition visible, then builds a research path around I'll, Live and Long.
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Reception evidence should be dated and situated: later canonical status may differ sharply from the work’s initial circulation. The source revision retrieved here is dated Apr 17, 2026. The linked authority identifier is Q136516238. None of the 0 selected statements returned an explicit reference. The first chronological checks are 2021, 2022, 2024 and 2026.
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