In which Irene and Seulgi's complicated relationship is solved with a cure that almost seemed impossible. Or; 2 years ago, a zombie apocalypose broke out and highschool couple Irene and Seulgi is reunited after humanity creates a cure that doesn't do what they expected it to do.

  Donghae didn't know about it but Hyukjae would always be there for him; through thick and thin, joy and pain. Hyukjae was always there. Even now when the younger had hit the rock bottom, Hyukjae was still there holding him tight.