 Following her concert debut, Mitsui was also featured in a small segment of the Oha Suta morning programme entitled , which purports to show the viewers a fictionalized account of the events following her first concert appearances, dealing with Mitsui's sadness over the fact she had to part with her former classmates due to her becoming an idol.Her first appearance at a non-Hello!Project related event took place on February 8, 2007, on Utaban, as part of Morning Musume.