You and hyunjin were in a relationship,a very healthy one with alots of love and care for each other,you had special abilities and time travelling was one of them,3 years ago ,on your birthday,you were happy to celebrate it with hyunjin, he was coming to you with cake and presents when he was murdered, he didn't return the whole night you were scared and you went to police station, after 2 days they found his dead body and he was dead, you wanted to know who his killer was and wanted to save him