I love you. Why did you leaves me? Does my love is not enough? Why did you cheat me? Please... dont say goodbye to me... - Loves you always,  Kai. Foreword The Last Goodbye  - HanaSakura  Characters ;  Kim Jong In/Kai - 18 years old(past) / 20 years old(present)- a nerd in school(past) / hottie in college(present)- loves Cho Juyeon very much- best buddy forever, Oh Sehun Cho Juyeon/Juyeon- 18 years old(past) / 20 years old(present)- a queenka in school / popular in college- girlfriend of Kai, didn’t realize that Kai’s love to her is pure- often seen with other guys- best buddy forever, Jae Jihoo Oh Sehun/Sehun- 18 years old / 20 years old- hottie in school & college- best buddy forever, Kai Jae Jihoo/Jihoo- 18 years old / 20 years old- queenka in school / popular in college- dating to Park Chanyeol - best buddy forever, Juyeon