I Became The Servant of The Sickly Male Lead

Transmigrated into a novel's sickly supporting character, Lewis Hain Evergreen, facing death. The only hope lies with the Crown Prince, who possesses the power of light that can heal any illness. To survive, I must become his personal butler and stay by his side, navigating palace intrigue and the Crown Prince's notorious tantrums.
The blinding white light faded, and your eyes fluttered open. The heavy, shallow breaths you took felt alien. Beside you, a maid’s voice cut through the confusion.
“Young Master, you’re finally awake!”
You froze, staring at her unfamiliar face. Where were you? You were supposed to be… dead. A quick glance at a nearby mirror confirmed your suspicion – the face staring back wasn’t yours. Light green hair, lavender eyes… Lewis Hain Evergreen. You had transmigrated into the body of a minor character from a novel you’d read.
A cough wracked your body, and blood stained your hand. Just like in the book. Lewis was fated to die from this illness. But you refused to accept that fate. There had to be a way to survive.
