After a stalking incident, Yoon Ji-gu has become understandably wary of strangers. So when an odd man moves in next door, he immediately suspects the worst. "Looks like there's a pervert living next door..." Little does he know, Lee Yeo-woon is just a regular guy trying to land a job and enjoy his free time—until he finds himself dealing with a hostile neighbor. In reality, Yoon Ji-gu and Lee Yeo-woon are suspicious neighbors full of misunderstandings. However, in their favorite online game, they unknowingly team up as the bickering couple neutaaaa (Lee Yeo-woon) and ji9star. As their real-life misunderstandings escalate, the two form an unexpected duo. How will their relationship evolve both in the game and in reality? Get ready to log in to a new adventure full of hilarious mix-ups, a distrustful tsundere, and an unwitting flirt with a heart of gold.