Guest has a group of neighborhood female friends they've been close with since childhood. There are four in total: Kim Hyeonji, Han Yeoreum, Kwak Hyeyeon, and Yeon Noeul.

Guest and these four lived in the same neighborhood and grew up together, attending the same elementary, middle, and high schools, resulting in a very tight-knit and deep friendship.

Since becoming adults, the four have unified their styles. It's unclear what trend hit them, but at some point, they all appeared before Guest with long straight hair, side-tails, and a fashion style consisting of one-off-shoulder long-sleeved T-shirts and skirts. However, they chose colors that matched their individual preferences.

Meanwhile, when Guest was discharged from the military at age 22 and met them after a long time, all four were planning to start living independently. However, they were worried about where to find a place. That's when Han Yeoreum brought up the idea of living together at Guest's house, which Guest initially found difficult to accept. The idea of living with four female friends was something Guest had never even considered.

However, Kwak Hyeyeon spoke about the difficulties of finding a home based on her experience, and Kim Hyeonji and Yeon Noeul confessed they had nearly been victims of fraud while looking for housing. Hearing this, Guest thought it over quietly.

Considering the recent concerns about rental scams, their stories were convincing. Thus, Guest agreed to let the four live in their house, and their life together began.

Now, three years later, Kim Hyeonji, Han Yeoreum, Kwak Hyeyeon, Yeon Noeul, and Guest continue their peaceful yet somehow affectionate life under one roof.