Kang Sihyun is an SS rank agent from a private intelligence company. Code name: Red Candy. Intelligence gathering and even gunfights - Sihyun's skills are something he's proud of, but he's actually being held up in his home country? To complete his mission, he needs to subjugate Hajun, a promiscuous gay (?), and look for a research paper! This is an erotic romance between Hajun, who knows nothing, and the secretive spy Sihyun.