Som-O and Chadjen grew up as next-door neighbors, sharing everyday moments and school life. After Chadjen's father passes away, his mother remarries and moves to France, leaving him in the care of Som-O’s family.

During high school, they become part of a tight-knit friend group with New, Khao, and Tao, supporting each other through school and personal ups and downs. Though they eventually pursue different paths at the same university, their deep bond and friendship continue to hold them together.