Oh my, oh my. Choosing is not easy, not easy at all. So that's why I've chosen two.
The first one is from Hana Kimi
http://www.youtube.com/watch?v=TcKW5_lIpUA&feature=related . I now know the song and dance by heart xP
The second one is from Halfway (possibly the greatest J-movie ever)
http://www.youtube.com/watch?v=42WA_1h_h9g . It's really beautiful.
Even though most of my favorite scenes are from J-dramas or movies, my absolute nr 1, is from the k-drama You're Beautiful. "The Fanfic-scene" may be the funniest thing I've ever seen! I can't stop laughing
http://www.youtube.com/watch?v=EFTKgcmBrn8 . I can even relate to the fanfic-part as I both read and write my own xP