在草加去伦敦学习的前夕，互生情愫的二人终于向对方传达出自己的情意，约定回来后相见。但当二人再次相见时，却是在战场上。而此时的秋月却已断了双腿，被战败弄得意志消沉。草加将秋月安排到了自己家，悉心照顾。但身处对立面的二人终究抵不过这时代的悲剧。就像这“冬之蝉”，生在了错误的季节，终究逃不掉悲剧的命运。 本片改编自新田佑克老师漫画《拥抱春天的罗曼史》的前传《冬之蝉》。共有三部分别是《江户恋歌》、《虾夷战记》和《东京悲话》。
The woman next door; She became my exclusive special advisor. I will teach you the real skills to inspire women's enthusiasm! The so-called theoretical expert Seong jin only understands women through text, and whenever he sees his academic advisor Professor Mi ae, he feels excited. However, Meiai ignored his courtship and told him to come back when he grew up. He felt helpless and finally revealed his pain to the novelist Yang Hua who had recently moved next door. To his surprise, she said she would teach him about women and start coaching him on real-life courses from kissing to sex.
使得本来弥漫诡异氛围的课堂，却成为3年E班终生难忘的回忆。而3年E班的同学们与杀老师以羁绊和真挚互动所守护的约定，也陪伴着他们到了7年后的未来。
