Yeon Hae-Geum, the nation’s one and only S-Class Guide, has been in love for years with Seo Moon-Hyeon - his guardian, mentor, and the man who raised him like family. From teaching him how to eat and read to mastering his guiding abilities, Moon-Hyeon has always been Hae-Geum’s everything. But just when Hae-Geum thinks he'll stay by his side forever, Moon-Hyeon suddenly announces his engagement… without even telling him. Crushed, Hae-Geum prepares to walk away... that is until fate throws in a twist: Seo Moon-Hyeok, Moon-Hyeon’s identical twin brother, shows up. Cold, blunt, and endlessly flirtatious, Moon-Hyeok needs Hae-Geum—not for love, but to power his climb to the top. Still, he’s not above using his twin’s face to seduce him. Now trapped between a possessive first love and a reckless new temptation, Hae-Geum must navigate a storm of emotions, pheromones, and dangerous attraction.

Will he remain loyal to the past—or give in to the thrill of something forbidden? One face, two destinies. One guide, caught in between.

(Source: Lezhin US, edited)