S.I.S have revealed their adorable music video for "Always Be Your Girl".

The girl group took on an adorable, school girl concept for their comeback, and in the MV, S.I.S blow bubbles, read, dance in the school gym, and more. "Always Be Your Girl" is the title song of the girl group's 3rd single album of the same name, and it's about being the cheerful influence in your life.

Check out S.I.S's "Always Be Your Girl" MV above, and let us know what you think in the comments below.