In 2018, Momoka Ariyasu left Momoclo. Rewinding her career on the Momoiro Clover Fandom Wiki, you will find she was in a group named Power Age for 3 months. A list of members and a photo from their defunct website is almost all that remains there. They had a total of 3 singles, all of them prior to Momoka joining. My Dear Friend, 約束, and Daisuki!!. There were songs prior to this, but very few mentions exist, all of them on archive.org. The one I want to focus on is My Dear Friend. The song is completely lost. According to their 2007/2008 era blogs, their manager's specifically: ameblo.jp/p-amanager I found a release date. December 4th, 2007. It also mentioned it being available on Mobage, a defunct cellphone app. Along with the info of who was performing each songs (which can be detailed on the Discogs page below), I believe they were a shuffle unit for a while before Daisuki, where all of the members participate in the song. According to their page on mixi.jp which I simply found with a quick Google search, a bit more info about the availability came to light. Mobage, which I already have mention of, and mf247.jp, an indie label that existed in the mid-2000s that ran a indie music download site. Sort of like bandcamp. I also found a Mercari listing as of late, which contained My Dear Friend and 約束, which I have no idea was endorsed by MF247, who did make some physical compilations, or if it wasn't. You can find info about it here: jp.mercari.com/item/m19076474767 and here: discogs.com/release/23640539-P-APower-Age-約束-My-Dear-Friend. When I first started this search, I also found a past listing of a live performance by the group containing the song on Aucfan, however it's been sold: aucview.aucfan.com/yahoo/e140715239/. 約束 was later covered by Shiritsu Ebisu Chuugaku, a sister group to Momoiro Clover Z. Momoclo themselves have covered Daisuki too. So it is very possible My Dear Friend was covered by another group trained by Stardust Promotion. If it was, it's possible it could've been covered with some adjustments. For example, Momoiro Clover Z has a song titled My Dear Fellow and Cho Tokimeki Sendenbu has a song called Dear Friend (which shares some quirks the Ebichu cover of 約束 has). However it's somewhat unlikely due to the titles not matching which wasn't seen in any of the other covers I mentioned. There is also an ameblo blogger who has posted about the song and likely has media containing the song. Their twitter is linked in their ameblo blog. They also posted a blog with a YouTube link to the song (not archived) here: ameblo.jp/ganbaremomoka/entry-11808091572.html. That's really about it in what I have to go off of.

Another thing I need to note is the members listed weren't the only members to have sang the song. The lineup did change from 2007 to their disbandment performance in May 30, 2009. From my research, My Dear Friend was performed throughout 2008 (probably as a full unit, the 8 members (performers of 約束 and My Dear Friend) and Rima Nishizaki who joined late 2007. That lineup would continue until Momoka Ariyasu joined and Erena Abe left in February 2009 where they performed with only 4 out of 9 members (not performing My Dear Friend, not relevant). Then, in April, there was a Star Fest event (Stardust events with that branding were held throughout mainly 2009 to 2012) Momoka and Sakina performed My Dear Friend together. This was also when the disbandment performance was announced which My Dear Friend was performed as a 10 member unit. That's all I know for now, and so it does prove that it's likely a version with Momoka with Power Age exists.

Oh yeah, here are all of my attempted contacts.

Stardust Promotion - automated response about the group being disbanded.

michitiomo (producer of 約束) - no response

Mai Yukawa (member) - liked comment, no response

Anyone is welcome to dig and find more about this song, or the group in general. Feel free to reach out to me about any efforts and further information on the group. I may have missed something on this post, I am not quite sure. Sorry for rambling, and I hope anyone who sees this has a lovely day :)

Keep in mind I am doing all of this searching myself with close to no collaborative effort and would really appreciate a more centralized and collaborative effort to formulate.