Now that he has motivation again, no need to play for the sake of playing. It's time for Kazu to return to being a genius! Though it seems he's also a genius in being a masseur, seeing as an idol seems to love his massages.
Mitsuki must have felt so tired from that practice. Her manager should really be watching her more, exhaustion isn't good for a performer to experience.
Mitsuki had the right idea that winning is not enough, you need a motivation behind winning. She saw so many idols burn out for that very reason. So I wonder, how will she and Kazu motivate each other to do well? Performing well is good for inspiration, but that can't be the only way for them to encourage each other.