In the MMORPG Illusion, players can earn extra rewards and bonuses from special events by forming in-game relationships. After a negative encounter with a player named Ji6Star, Lee Yeo-woon, who plays as "neutaaaa," decides against joining the guild Poseidon. However, this conflict results in Ji6Star facing repercussions from the guild master, who then convinces Yeo-woon to accept Ji6Star’s apology by spending real money on an in-game marriage proposal. Feeling responsible for the expense, Yeo-woon reluctantly agrees but keeps their distance. Despite this, Ji6Star’s persistent presence and help with leveling up make it hard for Yeo-woon to completely ignore them.
In real life, Yeo-woon moves to a new apartment where they meet their nervous neighbor, Yoon Ji-gu, who mistakenly believes Yeo-woon is a stalker. As both Ji-gu and Ji6Star become increasingly frequent fixtures in Yeo-woon’s life, they start to wonder if they will ever find peace, whether online or offline.