mihimaru GT's hiroko, who recently talked about resuming her activities, has revealed her new song "Super Rainbow" via YouTube. 

On the song, hiroko commented, "This song was made around spring 3 years ago. I kept this song warm." Although it's a short version of the song, fans were ecstatic to hear her voice after so many years. 

hiroko had been taking a break from her activities as mihimaru GT since 2013. On April 12, she updated her Instagram account after 2 and a half years, saying, "From now on, I hope to release music at my own pace."