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No wonder she has acquired that nickname of Pervert Sica… Her impish side kicked in again during the recent Korea-China Festival where she..well, um..poked Yoona’s butt with her mini Korean flag! Humorously enough, this little uh YoonSic moment–we’ll call it–was caught on camera! Watch the whole process below.

Hungry for more of her perverted side? Let’s revisit an old video:

Source: wonderfulgeneration, sonyuhshidae294@youtube