Hello! I saw that the song Koshitantan recently got a page here on the utaite wiki ^-^
Ahh, I also noticed that the song/dance version with Aoi, Shirofuku, and Kimagure Prince was added. However, the YouTube link is dead. I wanted to say that Musumen. (the group they're a part of) has an official YouTube here and that the video was posted on that channel here !
I would appreciate it if someone could fix the link and change it to the youtube link from their offical channel ^-^ I would do it myself, but I'm not familiar with how the site works. Thanks so much!