I really like the tee shirt, the wash towel, and the sunglasses.
The Betty Boop stuff is neat, but does nothing for me. I also think it's a little strange that Koda Kumi did the Betty Boop collaboration in 2016. I like that Ayu is having a tie-in that isn't just a brand, or Hello Kitty, but it would've been nice if it were something a little more original. Hopefully next time won't be Tweety Bird.