<With Love> is the first Japanese drama that I watched in my secondary school. Seeing this youtube brings me back to my sentimental high school puppy love. @_+
The storyline goes as follows:
Takashi (Takenouchi), a talented composer, who could not write a love song ever since his girlfriend Rina left him suddenly. Accidentally, Takashi sent an uncompleted piece of his latest work to Amane (Tanaka) via email.
Deeply touched by his music, Amane wrote back to him, without getting a reply. Amane continued writing to him, pouring out her thoughts, with the nickname of “Teru Teru Bozu”. One day, Takashi responded with a mail saying “WHO ARE YOU?” because what Rina left him as a farewell gift was a teru teru bozu!
(Quoted from http://jdorama.com/drama.445.htm)