YM7 was a AKB48 one-shot unit.
- On October 2011, a competition between YM7 and YJ7 was hold. The winning team would have their own original song. The winner was YM7, that won the song Renai Sousenkyo
- Sashihara Rino was the center of the song. Due to health problems, Kasai Tomomi didn't participate from the song.