Bound by the fate of a guide and a sentinel, Eunjae and Hayun were inseparable, always sticking together like one body. This bond persisted through their childhood and into adulthood, even after becoming special agents in the National Intelligence Service.\n\n"I love you, Eunjae."\n"I love you too, Hayun."\n\nTheir love seemed eternal. However, after Hayun fell into the Han River during a terrorist attack, and a funeral was held without even a body, Eunjae closed his heart and refused to let anyone close.\n\nLeaving Korea behind, Eunjae was merely fulfilling the formal role of a guide in the frozen wasteland of Russia when he met a kind stranger there.\n\n"I'm Natalie. Natalie Bell."\n\nNatalie's affection, as a sentinel of fire, gradually turned towards Eunjae, and eventually, she even came to find him after he returned to Korea with serious injuries.\n\n"...Why are you being so considerate of me?"\n"Why, isn't it obvious? I clung to you on my own, and that's how our connection was formed. Of course, I should do better. The one who loves more loses."\n\nWith Natalie's devoted care for Eunjae, his once-closed heart began to thaw, and warmth seeped into the way he looked at her. Then, unexpectedly, he encountered a familiar silhouette in an unexpected place.\n\n"...Wait a moment. Just a second...! Wait! Stop right there!"\n\nAmid the ensuing chaos, who will Eunjae's love ultimately be directed towards?