Jo Kang Ja (Kim Hee Sun) and Oh Ah Ran (Kim Yoo Jung) just manages to get out of the library thanks to Joo Ae Yeon (Oh Yoon Ah) and Park No Ah (Ji Hyun Woo) who closed their eyes to them.
"Do you still believe that Do Jung Woo (Kim Tae Hoo) killed your friend? I don't want you to be treated as a megalomaniac. I will find out what the truth is." the mother says.
The daughter shouts, "Are you gonna be a detective now?"
"I'm a mom. I can be even a judge and prosecutor to protect you," she answers.
Jo Bang Wool and Oh Ah Ran meet in with Go Bok Dong (Ji Soo) who has come back to school. Bang Wool asks him to apologize to Ah Ran but he refuses to do.
"You promised me to offer an apology to her!" she grabs him by the collar.
Wang Jung Hee (Lizzy) lets Hong Sang Tae (Baro) know about the argument between them.
Hong provokes Go into acting of violence and he swings at him with his fist. Finally, students have a group fight and the three are sent to the teacher's room.
Kang Ja reunites with her old friend Ae Yeon. Kang Ja hugs her with happiness but she has an apathy to her. "You are an unwelcome visitor to me. We have had undergone such a terrible thing."
"Thank you. I could restart a new life thanks to you. You made me the right person." she says with deep gratitude.
But Ae Yeon pulls a face, "Talk the bark of a tree to me!"
"As I get older, I've understood you." Kang Ja smiles.
Ae Yeon drops tears thinking of the past after she parted with the friend.
Bok Dong leads Ah Ran trying to find the secret door out of the library.
"Do Jung Woo killed Jin Yi Kyung (Yoon Ye Joo). Right?" she asks.
He makes spiteful remarks, "Do you wanna know the truth? She didn't kill herself. You killed her because you intruded yourself into the affair."
"She felt pity for you. She said that you have a rough manner, but deep down you are quite nice." she sheds tears.
After she has left, he also drops tears.
The vice-principal asks a bribe from Bang Wool's mother Han Gong Joo (Go Soo Hee) to cover up the gang fighting as she kneels down.
She locks the door and punishes the wicked(?). lol
Jo Kang Ja visits Do Jung Woo's house to find any evidence of Jin Yi Kyung's death.
The mother finds out a pregnancy tester and a letter of the friend of her daughter and she is in shock.