I was so upset when this was released in Japan, and I didn't have the chance to go see it. I'm a huge idol fan and Iwata Takenori is one of my favorites. After seeing him in "HiGH&LOW"; I wanted to see him take on a different role.
This movie story was alright. I'm not going to sugar-coat it and just 'cause Iwata Takenori is in it does not mean it's do all end all. The plot is pretty 'meh', rather typical of most shoujo stories with the side plot of plants and identifying them thrown in to mark it different. My friends remarked on how absolutely ridiculous the basic premise is. If you're looking for realistic, this story is not it. If you're looking for easy watching/not complicated this is for you.
However, it is light hearted and funny at times. Iwata Takenori (Itsuki) is 100% quality eye candy and his character is a perfect match. Takahata Mitsuki (Sayaka) is relatable, and honest, with plenty of faults and positives to make her well balanced. It's unfortunate you don't get to see either character really develop just based on the pacing of story, and the type of acting. The side characters don't see much screen time or development, but they're a solid background foundation rather then a hinderance.
The music overall is okay. Nothing spectacular about it, and at times the timing seems a little off/inappropriate for the mood. Not to the point of being unwatchable, but noticeable.
Again, I love Iwata Takanori. I love Takhata Mitsuki, so for me this movie was a no-brainer to watch. It's not complicated, but it's not boring. If you're looking for something light-hearted to watch without getting teary-eyed this is it. I'd rewatch just to see the eye-smile prince smile again, but it won't be frequently.