Kai is now looking for Krystal. He really feel guilty because he slapped her and he embarrassed her in front of many people. Yuri already explain everything to him, all about yesterday's incident. 

"Yeah...so that's what happened oppa" Yuri said to Kai. "I know that you're really mad at me, but I'm really sorry. I hope you understand why I did that. I am a fool, I am so sorry" Yuri said to Kai and she bowed to Kai. "Yah, Yuri-ah...no need to bow" he said as he feel guilty because he dumped her yesterday. "U-uh um...Yuri...erm, about yesterday...I may have not tell you this before. But, e-eh...you're a special person. U-urm...even if I act so cold, I actually care about you. That's why I slapped Krystal yesterday. U-uh...aish how do I explained this! I...I regard you as my sister. Uh...you always known that I always wanted a little sister. So if anything happened to you, I wouldn't stay here. I mean...I will always got your back, arasso? Aish I knew this sounds weird but I really bad at expalaination so I hope you understand it. Arasso, lil sis?" Kai said as he scratched the back of his neck and gave her a smile. Yuri stunned for a moment and she felt like a weight of burden been lift from her shoulders, a smile start to form in her flawless face. "I always wanted to have a brother too, and I understands it. Gomawo oppa, for everything" she said with a sincere smile. "Now go! You should say sorry to Krystal oppa" she said as she shooed Kai away with her fingers. "Yah, no hug from my sister?" He asked as he opened his arms for Yuri. "Aish oppa, so childish!" Yuri shook her head as she chuckled and hug him. "Go for it oppa! Aja Aja fighting!" She said to Kai as she waved

Kai is still looking around for Krystal. "aish! Where the hell is she?" Kai groaned in frustration. He really felt guilty after what he's done. Finally, he saw a familiar figure standing in the rooftop, he smiled as he saw the familiar figure. He's still panting, from the run he had when he was looking for Krystal. "Krystal-sshi!" Kai shouted and got her attention. She turned around and smiled awkwardly

"Jongin-sshi"