Lee Minho has always been the best at everything, effortlessly mastering every skill since childhood. Recognized at just 17 by the prestigious spy agency JYP, he quickly rises to become their diamond, for his exceptional abilities and charm. But everything changes when the 19 years old Minho's spotlight is challenged by the arrival of 17-year-old Han Jisung, a talented, all rounder, and ACE newcomer with a mysterious background and a reserved demeanor. For 3 years they would constantly argue, fight and couldn't work together without arguments. Everyone knew they hated each other. And the agency was done with the. So the gave them something...a blessing in disguise. Minho top. 23 years old present Jisung bottom. 21 years old present

Han Jisung is just another music student-chaotic, loud, and always five minutes late to class. He lives alone in a modest apartment near campus, surrounded by empty ramen cups and scribbled-down lyrics. His closest friends-Felix, Seungmin, Hyunjin, and Jeongin-are his safe haven, the family he chose for himself. Together, they laugh, fight, and survive the mess of early adulthood. But none of them are who they claim to be. Jisung doesn't know that the people he trusts most work for one of the most dangerous crime syndicates in the country. And what his friends don't know is that Jisung has secrets of his own. Everything shatters when Jisung uncovers the truth about his friends-and in doing so, reveals more of himself than he ever intended. The past has caught up with him. And it never forgets.