On February 27, 'OnStyle' revealed a video clip of the singer with the title "Do you know Seohyun's brother Seo Joo Hyuk?"
Seohyun introduced herself as "Seo Joo Hyuk." She wore a beret with glasses and sported a short hairstyle, perfecting the boyish look.
She also mimicked gestures made by fellow male idol stars and danced around making cute expressions.
The first episode of OnStyle's Seohyun Home' will air on March 1.
Watch the clip above where Seohyun freaks out when she realizes she was being recorded not wanting to spoil the transformation or perhaps too embarrassed to show the drastic change.