130415 Seohyun was mentioned in Siwon twitter update

[TJSiwon] It seems that a lot of people are curious about the ad shooting. The ad that i'm shooting is SK Telecom's LTE Noot. I'm having fun filming this because it's a fun service. I did a SectionTV interview as well with Sohyun.Credits: SM TOWN || Aloula@GG9sones Follow us On twitter @GG9SONES