When BoA entered the school, someone pulled her backwards.

"I thought I told you to leave this alone," said Kangta.

"Well I wanted to know," said BoA.

"BoA, I'm warning you."

"Just leave me alone oppa," and BoA made Kangta let go of her arm.

BoA was about to go to her 1st period class when she saw Leeteuk walking her way.

"Opa!" called BoA.

"What is it?" asked Leeteuk.

"I got something to show-"

"Oppa there you are," said Taeyeon, "You promised me that you would help me with my project."

"Oh right. Well BoA you can tell me later," said Leetuek leaving with Taeyeon.

BoA walked into the classroom and the first thing she saw was Yunho.

"BoA."

"I thought I told you to leave me alone."

"BoA please listen to me."

Class has begun, take your seats," said Mr. Kim.

While in class someone texted her.

You know you can have revenge on Yunho.

BoA didn't know the number.

How is this?

Lets just say that you know me.

After that BoA stopped texting the person. The bell rang and BoA tried to find Leeteuk again, but she couldn't find him. So she went to his locker to put the baby picture through his locker.

"What are you doing?"

She saw Cho hee looking down at her.

"...I..."

Cho Hee took the picture out of BoA's hand and looked at it.

"Hwa Young...means internal, beauty and prosperity..."

Do you know that baby?" asked BoA

"No I don't know that baby," then Cho Hee handed the picture to BoA and was about to leave.

"Wait," said BoA, "I want to ask you something. Do you know anything about my sister and the killer?"

"I'm sorry, but no," said Cho Hee, "Maybe you should leave this to the police, " and Cho Hee left.

The bell was about to ring for the next class period so BoA walked to her class. But she saw something that made her stop. She saw Leeteuk and Taeyeon kissing in a empty classroom