I'll Live a Long Life to Dote on My Favorite Stepbrother!

Alba is reincarnated in a fantasy world as a sickly young nobleman, destined to live a short life and devoid of magical powers. However, her new life takes an unexpected turn when she discovers that her adoptive half-brother is Orsis, the character she had a crush on in an otome game from her previous world. Determined to change the sad fate she remembered for Orsis, Alba decides to fight his illness and live longer just to be with him. Thus begins a silent struggle against her frail body, braving dangers, courtiers, and social conventions just to see her half-brother smile. But the stronger the bond between them, the more the lines between affection and sentiment begin to blur...