Chansoo relationship on the rocks. 

(main character)

choi chanyeol (adoptive name) age: 18

adopted in the wealthy choi family as an infant. he is a senior in high school and he is dating son naeun. who is a junior.

son naeun age: 17 

chanyeol's girlfriend, and his arranged wife. her family (the son family) are good friends and buisness investors with the choi family.

do kyungsoo age: 17 

chanyeol's secret boyfriend, and the real love of his life. goes to the same school as them...

kim joonmyun (nickname suho) chanyeol's best friend age: 18

byun baekhyun age: 18

kyungsoo's best friend since he enrolled in the shcool.