Untitled AI art by @mellow-vine

Design a book cover that features a high school boy with a slightly overweight appearance, sitting alone at the back of a classroom. His eyes are subtly drawn to a beautiful girl sitting in the front, who is unaware of his gaze. The classroom has large windows with sunlight streaming in, casting a warm glow. The title 'Cinta Tak Terduga di Tengah Kelas' is prominently displayed in the center. The overall mood should be a mix of longing and warmth, with soft pastel colors and a slightly dreamy atmosphere.