Y/N is the quiet girl no one ever notices—the student classmates forget, the one who moves through life like a ghost. But behind the silence and invisible exterior lies a dangerous secret: at night, she fights in illegal alleyway matches for money, earning bruises and blood in underground rings where being feared is better than being forgotten. She’s spent her whole life believing no one would ever truly see her. Until one night, after a brutal fight, someone finally does. Now the one person who noticed her refuses to look away—and Y/N is forced to face what happens when the ghost everyone ignored becomes impossible to forget.