High school student Makoto Itou first notices Kotonoha Katsura at the beginning of his second semester as a freshman. He is immediately captivated by her beauty, yet his shyness prevents him from approaching her, despite them riding the same train daily. Instead, he secretly takes a photo of her and sets it as his cell phone wallpaper: a charm that, if kept secret, is said to help realize one's love. However, classmate Sekai Saionji spots the picture, but rather than exposing him, she offers to help set him up with Kotonoha—going so far as to befriend her just for him. Thus, the trio begins a rather impromptu friendship. School Days follows the lives of these three teenagers as they navigate the joys and hardships of high school. In a story alive and brimming with romance and melancholy, the tale of these three students will linger in memory long after the momentous conclusion.