Yeah, I think it's only natural that as they become more proficient as individual performers, they would want to showcase their individual talents with their own songs. Unlike a huge group like MM or even own previous incarnations, the fact that there are only five of them now means that they can have room for projects like this on their albums. Thinking back (again) to SHOCK!, it was not only their first single in their current 5-member lineup, but also their lowest point in that lineup. It looked as though, post-Umeda, that management was seriously considering making C-ute to be just Airi and backup singers. And while something so calculatedly disrespectful would've bred resentment and even broken up lesser groups, somehow C-ute managed to step back from that and remain intact as a team and (seemingly) as friends as well. Since then they've been steadily more inclusive, distributing lines more evenly, and working hard on powering up their talents as performers in multiple areas. Getting their own individualized songs is the culmination of the process toward equalization that started after SHOCK! Sure, they
could break up after this, but what this album means is that they no longer have to.
I remember reading once about the history of the Beatles. As a group they consisted of four members -- two lead singers who also did the majority of the songwriting, a backup singer who was also a gifted guitarist/songwriter, and a drummer who was kind of the Nakky of the group. They started off with a unified characteristic sound, but as they got more mature, their tastes as singers and performers expanded and diverged. The backup singer demanded more input on the albums, and even the drummer wanted to sing, and this caused friction with the two leads, who were also fighting with each other over the group's future direction. Toward the end of their career as a group, they were all in the process of contractually negotiating an equality arrangement with each other where each member would get three songs each, because having their own songs was the only way they could continue to feel engaged in the creative process. However they wound up breaking up before they could execute that plan.
So I like to think that this album represents C-ute as reaching an understanding that even eluded the legendary Beatles, that they are all equal and all deserve the same chance to perform and display their growing skills. Obviously the situation's not really the same, since the Beatles owned their own trademark whereas C-ute are technically just salaried performers. But in spite of that, they certainly have some input on the continued direction of the group, and this album shows they can work together to move it in a direction they all agree with. So for that reason, they don't need to break up. Because, like C major 9, they're a chord which has a distinctive uplifting sound and
needs all five fingers to play.