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！

Alba has been reincarnated as the son of an impoverished noble family. When his mother remarried into a dukedom, he was introduced to his stepbrother, Orsis, his "favorite person" from his previous life. “Does this mean my favorite is now my stepbrother?” he thought joyfully, But he suddenly remembers that he was the reason his beloved stepbrother lost his smile… To avoid his impending fate, and continue loving his favorite, Alba will do everything in his power to twist fate! This popular series, which has sold over 170,000 copies, brings you a warm and touching story story of a boy's reincarnated life in another world!

Sinopse em inglês; tradução ainda indisponível.