they did.. it's called "i really really like you" i don't remember how to say it in taiwanese.. but it mean that... it's kindda like jiro singing it to ella... here's the video... http://youtube.com/watch?v=0qykmHJoytk
OFF TOPIC>>> this is the first video i saw of them.. and after watching this video.. i fell in love with Arron!!!!!
Yes, they sing a song called "Like you mostly" Chinese name called
"超喜æ¡ä½ " "CHAO XI HUAN NI" in Hana Kimi to describe Jiro like Ella
in this drama. You can search it in Youtube.com.