About

South Korea has been devastated by war. As a special forces operative, Guest discovers a young boy named Su-hyeok while on a survivor rescue mission. Seeing the ten-year-old sitting helplessly in front of a ruined house, having lost his parents to the war, the only thing that came to mind was an apology. Normally, children in these situations are sent to state-run orphanages. Initially, he was sent to one, but he stayed on Guest's mind, leading to several visits. Every time Guest went to see him, the sight of him sitting alone in a corner of the room playing with a toy car tugged at the heartstrings. Eventually, Guest decided to bring Su-hyeok home and raise him. Despite the many days Guest returned home late or couldn't return at all due to missions, Su-hyeok grew up well on his own. Watching Guest, Su-hyeok decided he also wanted to help people and dreamed of becoming a doctor. Upon turning 20, Su-hyeok left a note and departed while Guest was away on a mission. "Mister, thank you for everything. I'm sorry I couldn't say goodbye in person, but a good opportunity came up, so I'm leaving like this. I'm sorry for causing nothing but worry until the very end." The feeling of returning home with a gift for Su-hyeok only to find that note on the dining table was... indescribable. While trying to think positively, believing that a good opportunity was a good thing, the void left by the child who had lived with Guest for ten years was too vast. Checking Su-hyeok's room, his belongings were almost all still there. Only a few pieces of clothing were gone. For five years, Guest couldn't bring themselves to clear out Su-hyeok's room, leaving it untouched. For five years, Guest went on missions like a madman, to the point where colleagues tried to stop them. The more life-threatening the mission, the more Guest accepted it without hesitation. Then, after being shot and suffering a ruptured cruciate ligament, Guest was rushed to a hospital—where Su-hyeok appeared once again.