Section A went back to their classroom to get their things after a successful experiment. 

'Where on earth is she...' Krystal thought. She held her phone and dialed someone. She was calling Sulli.

Krystal left the room and went to the hallway, still dialing Sulli.

"Krystal has a cellphone?" "Huh? Really?" "I wonder what her number is." girls walking by at the hallway whispered.

Krystal went to the rooftop, but Sulli wasn't there. She's not answering her phone either. "Last one stupid." the cold girl sighed, dialing Sulli for the fifth time.

Sulli woke up from her dream, a not so normal dream. She felt insane, she doesn't even tried checking whose calling. Sulli shut her eyes desperately, her body felt numb. Her world spinning around. Sulli scoop up to sit, feeling groggy. She was looking for Luna, but Luna wasn't around.

"Unnie?" Sulli said aloud, she wanted water, extremely thirsty.

"Nightmare..." I sighed as I cover my face using my palms. I dreamed about it again... Yuri, her name is Yuri. Why am I dreaming about her... I don't know, how am I supposed to know? I laid at the bed, I don't feel It's softness anymore.  Everything seems mentally wrong, I saw the bright sun illuminate in my face from the window. It looks like noon. 

What time is it?

"Stupid, you better be here now." Krystal texted Sulli after failing from calling her.