"Wake Up" is a pop song by the Japanese duo and idol unit ClariS, written by Mayuko Maruyama.

It is set in common time and moves at a tempo of 132 beats per minute in the G major key throughout the song.

According to Clara and Alice, the songwriter Mayuko Maruyama has a strong understanding of ClariS' image and writes music for them that matches their feelings.

Clara and Alice related the lyrics referring to a transition to a new lifestyle to their enrollment into high school earlier in 2012.

"Wake Up" was released in limited and regular editions on August 15, 2012 as a CD by SME Records in Japan.

The microbes are initially shown dancing around an alarm clock, and chibi versions of Clara and Alice are also introduced.