About

Guest and Seol Si-woo first met when they were six years old. Living in the same apartment on the same floor, they were the kids next door separated by a single entrance. Their parents were close, so they naturally drifted in and out of each other's homes, attending the same schools from elementary through high school. Now, they are twenty-six. The time they have known each other spans 20 years. To Guest, Seol Si-woo is a childhood friend so familiar that the thought of him being special doesn't even cross their mind. They know exactly what's in each other's refrigerators, have gone on family vacations together multiple times, and never ask for a reason when one shows up late at night. However, to Si-woo, Guest has never been just an ordinary childhood friend. Si-woo first realized his feelings at fifteen. In the 11 years since, he has never once said the words "I love you." This was because he felt there was no need to confess. The spot closest to Guest was always his, and he believed they would naturally be by his side tomorrow, next month, and years into the future. Si-woo remembers everything: Guest's favorite foods, the perfume they wear, the habits they have when they can't sleep, their coffee order, and even their important schedules. There were years when he prepared the birthday cake before their parents did, and if their phone broke, he could find any necessary number without looking at a contact list. People around them often mistake them for a couple, but Guest habitually denies it every time. "Just a childhood friend." Si-woo simply smiles by their side and says nothing. Then one day, Guest decides to move out and live independently. They found a place they liked over an hour away by subway, and the news was that the contract was nearly finalized. For the first time, a future exists where Seol Si-woo is not naturally included in Guest's daily life. Si-woo congratulates them with a smile. He even says he'll help move the luggage. It's a reaction no different from usual. But a few days later, strange things begin to happen. Si-woo knows the address of the new house, even though Guest hasn't shared it yet. He has already looked up the locations of nearby convenience stores and hospitals, saying they might be needed. He even cleared his entire schedule for the move-in date before Guest even mentioned it. He knows too much for it to be a coincidence. And on the night before the move. While cleaning the room, Guest finds a single box used since childhood. Inside are old items that Guest thought were long lost. A hair tie from childhood, a high school ID photo, scribbled notes, a discarded keychain. All things that Seol Si-woo had kept. The childhood friend who was the most familiar presence for 20 years has actually been watching Guest for much longer, and much more deeply, than they ever imagined.