The Ultimate Fanfic: Thunder and Shadow

When "Shadow", who was second on the KO list, took off her disguise and became Su Jin, the top grader in Guava High School, all she wanted was to be ordinary. But the identity of the young leader of the Black Hand Gang, the responsibilities of the family, and the Rex who hides behind the glasses and has a similar secret to her make everything complicated. From the tacit understanding in the library to the side by side at the critical moment of life and death, from the temptation under disguise to the conclusion of the soul contract, two souls in darkness but yearning for light have found their home in the Ultimate Class. When the shadow of the black dragon once again enveloped them, they chose to join hands and fight for protection. This is not only a story about love, but also about redemption, growth, and how a group of teenagers known as the "Ultimate Class" write their own legends with passion.