Jessica Jung was a transfered student from the U.S.A to Korea's S.M University. There she meet Seohyun, Yoona, Kyuhyun, Siwon and Donghae. Donghae had a secret crush on Jessica and so did Jessica. They didn't know until Donghae confessed to Jessica. Donghae and Jessica were happy together. Girl after Girl tried to break up Donghae and jessica because they all wanted to be his girlfriend Could haeSica still be together? Or would Donghae leave Jessica forever and find a new love? Seohyun was from S. Korea's Universtiy, there she had a friend named Yonghwa. They were very close and was also dating. But one da Seohyun saw him cheating on her for another girl. She didn't want to be cheated on so they broke up. trying to forget abll about Yonghwa Seohyun transfered to S.M University where she met Kyuhyun who was very nice to her. They soon became really close. Are they just friends or.. Krystal was Jessica's little sister who also was transfered from the U.S.A to S.M high school. On the first day off school she was totally lost. Lee Taemin (Donghae's little brother) saw her and helped her. They both became friends and were like brothers and sisters. Taemin secretly has a crush on Krystal, but she doesn't realizes it.