就读于私立日向女子高级中学的町田雏（上户彩 饰），在保健室认识了同年级女生红子，当晚她们到闹市区玩乐。与红子分开后，雏独自一人到电玩店闲逛，遇到了一名男子湖贺郁巳（藤木直人 饰）。雏被他吸引，跟着他到餐厅吃饭，她自称是20岁的美容师，后来还一同去了他家里。随后雏想回去，而郁巳希望她能留下。当夜二人同睡一床，但并没有发生关系。 次日，班上来了一位新的数学老师，雏惊讶地发现这名老师居然就是昨晚的男子，然而他却没有把雏认出来。因为外貌帅气，郁巳在学校里很受欢迎，被邀请担任游泳部的顾问。当晚，老师们带他一起到闹市聚餐。但是郁巳对这一切都提不起兴致，他有自己的秘密。与此同时，雏终于猜出了郁巳的邮箱地址，她向他发去求助信息……Hina, a student at Nikko High School, goes out one evening with her classmate Beniko. They get split up and Hina ends up in a strange meeting with a man named Ikumi in a game arcade. The next day, Ikumi turns up as the new teacher at her school. Ikumi doesn't seem to recognize Hina but the wheels of fate are slowly moving to reunite them in what is a passionate story of forbidden love. One of the main underlying themes of this drama is death. Another important theme is the struggle Hina and Ikumi have in trying to realize the difference between love and dependence - or is there a difference?
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