Sana wakes up early than usual and saw Mina depressed.

"What happened Mina?" She asked

"Nothing." Mina answered with sigh

"Is this because of last night?" Sana bend her head towards Mina.

"Absolutely not!" Mina shouted raising her head hitting Sana

"Oww." Both said rubbing their heads.

"Don't remind me. Arrrrgggghhhhh." Mina said then left.

"What.?" Sana followed Mina

As they got out they saw Seung Cheol cleaning.

"Oh. Good morning. Do you need something? Is your fever gone?" Seung Cheol asked checking Mina's temperature using his forehead. Mina blushed then she pushed him.

"I-I-I-I-I'm fine." Mina said then left

"What's her problem?" Sana asked herself then put her forehead against Seung Cheol's. Seung Cheol was suprised when he saw Sana up close.

"Are you sick too Sana?" He asked taking a step back.

"Ehehehe. Nope. I'm just trying something." She giggled

"Ha-ha-ha." He sqeezed in a nervous laugh. "This girl is dangerous." Seung Cheol warned himself

 After school. 

"Seung Cheol!" Sana popped out of nowhere

"Wha-what?!" Seung Cheol suprisedly answered

"Now. You have to go with me." She said

"Why? Where?" He asked

"Just come." Sana pushed him.

"Wait wait." Seung Cheol said

At a café.

"Okay. Why are we here?" Seung Cheol asked as he drinks his tea.

"Well. Look over there." Sana pointed out.

"So what." He replied seeing a sweet couple

"You see that.?" She asked

"Yeap. So what's wrong?" Seung Cheol sipped in his tea.

"That guy is my ex boyfriend." She answered. Seung Cheol spitted his tea.

"Really?!" He wiped his face.

"Uh-huh." Sana sipped in her drink.

"Let me guess.  You want to have you're revenge?" Seung Cheol asked

"Ding ding ding." Sana said imitating a bell. "And you'll be my boyfriend."

Then Sana pulled Seung Cheol's arm and went to the couple.

"Oh. What a coincidence to see you here, Jun-myeon or should I say Suho." Sana greeted

"Hi. And you are?" Suho replied

"Isn't she your..." Seung Cheol was cut off by Sana

"I'm sorry. I think I mistook you for someone I knew." Sana left.

"You know what?! I may not know you but you're an . A big one for that matter. And I think it's best for you two broke up." Seung Cheol said

"Look. I don't know what you're saying. You know nothing of our past. So shut up!" Suho replied hiding his frustration as he stood up

"Yeah. I don’t.  But I'm glad I don't, because maybe if I do I've already punched you in the face." Seung Cheol said

"Just who..." the girl Su