Yanyan is a German high school student. She is Maffy`s twin sister. The two girls are not identical, but sometimes they can fool people into thinking that they are. Yanyan is a very different person from her twin. Maffy is adventurous and wild, but Yanyan is a gentle, quiet girl who likes to write in her journal and compose her own songs. She is a great piano player, and some record labels are already interested in helping her to release her first record.