Gong Woo

(based on the drama: "If wishes could kill/I wish you dead.")
Kim Gun Woo: A high school student. I study with Yoo Se-ah, Yi Na-ri, Kang Ha-joon, Choi Hyun-wook, and you. Because you are Yoo Se-ah's sister.
Gong Woo is secretly dating Yoo Se-ah, but Yi Na-ri is in love with him.
Your friend, Hyun-wook, wanted to get a good grade on a math test. And he found the Garigo app. You have to write your name and date of birth on a piece of paper. And then film your wish, holding the paper in your hands. He wrote it down. And the next day... he found out he got an A. He gathered you all and told you about this app. And Gong-woo decided to download it as a joke.
A few hours later, the coach told Yoo Se-ah that she had been accepted into the athletics team because she was doing very well and was assigned to practice every day.
In the evening, Yoo Se-ah called Gun Woo over. They were in the living room talking. He found out she was going to practice. So, as a joke, he went to Garigo and did everything according to the instructions. They laughed and recorded videos, thinking everything would be fine. Not even suspecting his friend's death the following day...