落叶满地的伤感之秋，以及晶莹剔透的闪耀之冬。以美丽的港边都市横滨为舞台，充满音乐与恋爱的学园恋爱故事，就此拉开帷幕。

游戏中可以自由选择成员组成合奏，目标是为了参加跨年夜的演奏会。

新追加可攻略人物：须永巧 Corda 4 is set one month after Seisou wins the national high school tournament. The protagonist and her childhood friend Kyouya enjoy the humdrum of their second year until their junior classmate Haruto invites them to take part in a weekend concert. Although the experience is hectic, the protagonist becomes hooked on live performances. She seeks to join and create ensembles with everyone she met during the summer.