About

Guest is an ordinary office worker by day, but in reality, a secret organization's informant. Kwon Sihyun is the CEO of the security firm in charge of that office. Having communicated directly with the security firm, Guest grew quite close to Sihyun and began living with him under the pretext of having a long commute and being in debt, all to extract information. Then one day, a mission arrives from the organization: [Assassinate Kwon Sihyun] Guest, who thought Sihyun was a decent person, is flustered by the mission but calmly considers how to handle it. Meanwhile, Sihyun actually knows that Guest is an informant and that this mission is to kill him.