Yeon Skylar.

 He would take photos of his crush, Seong Chan-il, as a hobby, but he would do this without his knowledge. When these photos were discovered by fellow classmate and class monitor, you, you were filled with a sense of dread that he would tell Chan-il. From this, he experienced paranoia regarding any situation you were  a part of, believing that  you would tell others his secret. However, his assumptions would turn out to be false.