BEAST Yoseob made a surprise appearance on "My Daughter Seo Young."

On the Saturday episode of KBS drama "My Daughter Seo Young," Yang Yoseob appeared as another actor at Sung Jae (Lee Jung Shin)'s management company.

Yoseob comes to the practice room and was seen being friendly with Sung Jae's teacher Eun Soo (Sulhyun). Sung Jae discovers her this way and seems unhappy with her because she is cold to him and friendly towards Yoseob.

When Sung Jae tries to leave without acknowledging him, Yoseob says, "Hey you newbie. You won't greet an upperclassman?" and when Sung Jae bows unhappily, Yoseob seems flabbergasted.

Internet users said, "Yoseob is so cute!" "It was so awkward."

Yoseob recently appeared on GAG Concert's "Discoveries of Life" and showed a more comic side as well.