Flashback 

Jessica looked around. Just where had her sister Krystal gone? They were in the Seoul public library now. Jessica pondered around searching. Krystal had the tendency of suddenly disappearing and then suddenly reappearing again. Jessica exited the kids section and entered the teens section and noticed a familiar face in the corner of her eye. 

Donghae... It was Lee Donghae, whom Jessica had not seen in four full years. Ever since Jessica had left SNSD four years ago, she hadn't reseen any of the SNSD members or anyone else in SM town (excluding her sister, who was still missing) including Donghae from Super Junior. Donghae used to be her boyfriend before she'd left. 

Being forced out of SNSD had been heart breaking and leaving Donghae had been even worse. 

Their eyes met suddenly and locked for a full minute before Jessica forced herself to look away and walk away. She continued to look around for Krystal. A bunch of memories of Donghae flushed back into Jessica's mind. Her hibernating feelings... were awake now.