Each chapter is based on a different lyric from the song "Some" by Soyu and Jonggigo ft Lil Boi of Geeks, and takes us along in Cheng Xiao's and Eunseo's journey of dealing with the way their relationship doesn't feel entirely platonic, but it is not romantic either. 

      (I got inspired to write this while watching this video and I recommend you watch it because it's really good! :) )