A photo Seo In Young�shared has her fans talking.

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On December 27, the singer posted the above photo to Instagram along with the message, "My dongseng." Different from her usual charismatic aura, Seo In Young put on an adorable pose with her younger sister.�

Netizens found that the beautiful girl with long, wavy hair next to Seo In Young was Seo Hae Young, a former internet ulzzang. They commented, "Seo In Young's younger sister is really pretty too," "They have different charms," "I want to see her face," and "Their DNA is blessed."