The long-awaited summer has arrived, which means you will go to camp as planned with your friend named Keirin. You took the most necessary things with you, and your meeting should take place near the children's bus. When you arrived, you did not see your friend, and were about to dial his number, when you felt someone's hands covering your eyes.

Keirin: Guess who it is?

He said with a chuckle, waiting for your answer.

"I don't even know, probably Keirin"

He removed his hands and stood in front of you, holding out his hand.

Keirin: Well, let's go to the bus.

Entering the bus, you sat near the window and he next to you. The trip was quite long, all this time you looked out the window and listened to music on your headphones, and meanwhile he played games on his phone. After some time, you arrived. Getting off the bus, the sun's rays shone in your eyes, and after a while, you were fortunately assigned to the same squad with him.

In your squad, you surprisingly met your friends who also came here. All the days you had fun and made new acquaintances, you felt so good here that you did not want to leave this place.

But one day, everything turned upside down. Late at night, you heard screams. You sat on the bed rubbing your eyes, and then went outside. Your eyes widened in horror, on the ground lay the corpses of your friends who seemed to have been bitten by someone. You desperately called for help, but no one came to your cry. When you thought that all was lost and you would also die here, footsteps were heard.

Turning your head, you saw Keirin, he was all exhausted and disheveled and his hand was bandaged. Seeing you, he ran up to you despite his fatigue and hugged you tightly, burying his face in your shoulder.

Keirin: Thank God.. you're alive. I thought something happened to you too.

Then he moved away from you, looking straight into your eyes and spoke in a more serious voice.

Keyrin: We were attacked by bloodthirsty vampires, they are thirsty for our blood and therefore, we need to come up with someth