Today, they will do an experiment. They need to do frog surgery. Wana feel uncomfortable because she know, if she see and smell the blood. Her desire to taste the blood will getting high.

Chanyeol look at her. Chanyeol think, Wana might kill everyone but she can not read more about what Chanyeol think. Her advantages of read mind is limited. She do not know why, but she think that might be relate to Chanyeol.

"Oh damn, Suho and Tao are here. If I can not control myself. My brothers and I will die." Wana keep saying that on her mind. She hope that the class will immediately end.

They are ready to do the experiment, they already put the gloves and mask. They carefully put the knife at the frog. Wana start smell the blood. She close her eyes, that the only way to make her survive from tasting the blood.

One of the students, accidentally cut off his finger and his blood make Wana's thirsty. She can not hold it anymore. She open her eyes and start to go towards the boy but Chanyeol quickly hug her from the back and close her eyes with his hand.

All of the people in the class are busy helping that boy. So they not realize that Wana and Chanyeol are get out from the laboratory.

Chanyeol takes Wana to the school's roof, she still can not open her eyes because she afraid that she might be hurt Chanyeol.

"Is okay, you can open your eyes now. We are at the school's roof." Chanyeol say while look at her. "I can't. If I do that, someone will get hurt and I don't want to hurt you or anyone." Wana say while her body is shiver. She still can smell the blood, how the blood flows out and how the blood taste.

Chanyeol slowly hugging Wana and hold her hands. "Wana, stop it. You only make yourself getting worst. I promise that I will help you to overcome your problem." Chanyeol say while hug her.

Wana slowly open her eyes and she find out that she in Chanyeol's arms. She feel awkward but it's comfortable. After a few minutes, Sehun and Luhan come at the roof. Chanyeol quickly go away from her. Luhan and Sehun only look at each other.