Earlier this week, the official Japanese website for the pop duo ClariS was updated with a character visual for the newest member Karen, illustrated by Otohiko Takano. As the replacement for Alice, who left the duo to focus on her studies, Karen made her debut with the song "Clear Sky," which was included as a bonus CD with M-ON! Entertainment's Lis Ani! Magazine.

The magazine also revealed that the duo will be singing the ED for the upcoming Tsukimonogatari anime, Border and that they will be doing their very first live show during Lis Ani! Live 5 on January 25, 2015.