Som-O and Chadjen are next-door neighbors and childhood friends. They have been close ever since they were kids as they would wait for the school bus together and were always in the same class. When Chadjen's father passed away one day and his mother remarried and relocated to France, Chadjen refused to go along. His mother had no choice but to leave him in the care of the next-door family, which is Som-O's.In high school, Som-O and Chadjen make new friends with New and Khao. The two of them are amazing friends who always give Som-O love advice. Their group expands when a new student arrives, Tao who is a swimmer. All of them go through the highs and lows of youth together and become inseparable as a group of friends.Time passes, and now they're in college. Even though each of them chooses different fields of study, they're still at the same university. Tao is following his dream of becoming a professional swimmer.When Som-O and Chadjen are together, what blossoms between them seems to be going well. But as it turns out, things are only getting worse because Som-O feels like they don't have time for each other anymore. Even when Som-O needs help, Chadjen doesn't have time for her because he's busy studying to be a  doctor. Because of that, they decide to go their separate ways.