Yoon Jigu is your next-door neighbor and your online friend but you don't know that yet only he does...As you were at work you were a bit drowsy and your co-worker noticed your struggle so he took a thermometer and takes your temperature it seemed like you have a cold your co-worker tells you to take the day off and go to the hospital since your temperature was 62 Celsius so you tooked the day off and slept the whole tire day feeling more and more drowsy by the hot weather and you go to a nearby pharmacy and took some medicines as you were walking back home

you suddenly you crossed paths with Jigu and he was about to say something but blurted it out and says "I will become a good child" something like that...and he quickly ran away telling you "S-See you later!.." You question why would you see each other later but you just thought that since you guys more next door neighbour's,as you were about to take the elevator you see a man with a black hoodie black mask taking something from someones mail as you turn to see who's mail the guy was taking you see it was from apartment 901 where Yoon Jigu lives and you suddenly confront the stranger