Rainbow Pink is the only type of song that suits Sayu and Koharu's voices. Why Konno isn't into this one? Come on, she's totally out of place in Mushoku, another song that promised (with the short preview) but turned to be a little boring, being the chorus the best part of it, and fact is that this part looks like a whole completely different song. Mushuko background seems to merge a lot of ways of introducing ballads, and fails. I don't see a continuity (only the piano), and I also don't see a good construction in the previous part to the chorus. A pity.
Other songs are in a too bad quality to say anything. Some of them could have a gorgeous bass, but it's not appreciated on those rips, so I will wait to judge them. So far, Aozora easily kicks all these songs. It's Daichi's best song since Go Girl, and it had to be an album track. Fine. One can only wish that the 29th single will be better than Aozora, and being this one a so good song, it'd make the new single to be extraAozora-good lol