Krystal woke up with a start and rubbed her eyes. Looking around, she realised that she was in her high school classroom as the familiarity surged up. Sitting beside her was Choi Minho, her tablemate then, and he was staring at her with a teasing look on his childlike face. 

 

"Tsktsktsk. Sleeping in class." 

 

Krystal was about to rebut when it struck her that she had a mission to accomplish. Grabbing Minho's hand, she said urgently, "10 years later, on this day, do not save me from the speeding car. No." 

 

Then, she realised that she had been deprived of her voice. 

 

Damn. Her 60 seconds were running out. 

 

Fervently, she tore out a piece of paper from her maths worksheet and scribbled "10 years later on this day, don't save me from the speeding car" and ed it into Minho's hands. He looked at it bewildered, but Krystal had already vanished into thin air...