A video showcasing a preview of the song was recently uploaded to Takeuchi Miyu’s official youtube channel.  The video is named “original song”…. so I guess it’s untitled for now.

The song preview for the untitled song can be heard here:

“自分のオリジナルを初めてアップしてみます
打ち込みで作りました
曲も歌詞も遊び心です”

The description of the video says, “I’m uploading one of my original songs for the first time. I put a lot of work into this. The song and the lyrics are really playful”.

If you’re not familiar with Miyu’s other solo efforts, she’s done some very excellent piano covers of AKB48 songs. Here is Chance no Junban, and Shonichi.