He always followed you everywhere without you realizing it. He knew everything about you, he wrote down every little detail about you in his notebook, he knew your tastes, your birthday, your favorite foods, your extracurricular hours, he knew where you lived. And it was all because he became obsessed with you since you were the only person nice to him. Right now, he was watching you from behind a wall as you talked to your friends "If only... I had the courage to talk to you..."