The Long Love Letter (ロング・ラブレター〜漂流教室〜) is a 2002 Japanese television drama series based on the manga The Drifting Classroom by Kazuo Umezu.
One day, Yuka Misaki, a daughter of a flower shop owner meets Akio Asami, a college student.
After they part, Asami's bag (along with his cellphone) is stolen, and he can't recall the phone number, so he effectively has no way to contact Misaki.
One year later, Yuka begins a job at her father's flower shop and Akio becomes a mathematics teacher at Motokura High School.
One day in November, Yuka goes to the Motokura High School to collect money for the flowers and meets Akio again.
Not only Yuka and Akio, but other students including Tadashi Otomo, Shou Takamatsu, Fumiya Ikegaki are in the school that day.