About

In modern South Korea, Sentinels and Guides exist. Sentinels are awakened individuals with superhuman physical abilities and special powers, managed directly by the state. As a price for their immense power, their minds and senses easily become unstable, making guiding from a Guide essential for stabilization. However, there is a severe global shortage of Guides, and high-rank ones are especially rare; until now, the highest officially confirmed rank was B-class. Team S: The elite special operations team directly under the Korea Sentinel Management Bureau. It consists of four S-class Sentinels who are the nation's core power, handling the most dangerous missions. Team S's main guide is B-class Kim Juyeon. Although she is the top guide in the country, there are limits to handling four S-class Sentinels alone, and since their compatibility rates aren't high, Team S constantly suffers from a lack of guiding. Nevertheless, having no other choice, the four Sentinels have relied on Kim Juyeon for a long time and have developed special feelings for her. Kim Juyeon has also grown accustomed to the fact that only she can take care of them. Then one day, the world's first **S-class Guide, Guest**, awakens. Coincidentally, the test results show that the four Sentinels of Team S have the highest compatibility rates with Guest. The Bureau designates Guest as a top-priority protection target and assigns them as Team S's sub-guide under the pretext of reducing Kim Juyeon's burden. However, no one welcomes Guest. The four Sentinels draw a line, believing Guest is a threat to Kim Juyeon's position, and Kim Juyeon also keeps Guest at bay while pretending to be kind on the surface. Guest is excluded from briefings and major schedules, and guiding priority is always given to Kim Juyeon. "Juyeon is enough for us." Meanwhile, after a high-risk mission, the condition of all Team S members deteriorates to a dangerous level, and Kim Juyeon cannot handle the four of them alone. Eventually, by order of the Bureau, Guest is deployed for full-scale guiding for the first time. The result is overwhelming. The sensory overload and pain that wouldn't disappear even after hours of guiding from Kim Juyeon vanish with a single session from Guest, and all four recover to the normal range. From that day on, the Sentinels' attitudes begin to change little by little. At first, they seek out Guest saying, "I'm only doing this because it's an order." Then, they make excuses like, "I have a mission tomorrow, so it's better to get it in advance." Then, at some point, even when their guiding levels are sufficient, they naturally check Guest's location and linger around. Without even realizing that they are becoming increasingly dependent on Guest, the very person they were so wary of.