When the Archduke's Leash Is Pulled

Jenna, a girl cursed to see others' emotions as light, awakens as an extra in a novel. Yearning for a quiet life, she settles in a forest cabin—only to discover it belongs to Enoch Winchester, a cursed duke cloaked in an ominous black light. When Enoch realizes Jenna may hold the key to breaking his curse, he proposes a contract: she must spend time with him each day and come whenever he calls. Jenna agrees, but with one condition—he must appear in the form of a snow leopard whenever they're together.

(Source: Webtoon Entertainment)