S.I.S have dropped an adorable music video teaser for "Say Yes"!

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In the MV teaser, the S.I.S members reveal their cute, school girl concept as they hang out at home. S.I.S's 2nd single album 'Say Yes!' includes their title track "Say Yes", "One-Sided Love", and "Pink Flower", and it drops on�September 20 KST.

Check out S.I.S' "Say Yes" MV teaser above, and let us know what you think in the comments below!