This is a music which I loved, when I am a junior high school student.
Eiichi Otaki - Koisuru karen (Karen who is in love), from the album "A LONG VACATION" (1981)
http://www.youtube.com/watch?v=g42G5p7Tzss
Orchestra version, From "NIAGARA SONG BOOK"
http://www.youtube.com/watch?v=_n64SB4gy7U
possible