Natsu no Koi wa Nijiiro ni Kagayaku

This is a good, well-written, well-acted romantic comedy jdorama. Not a revolution, nothing too original or unforgettable about it, but well-rounded and very pleasant to watch.

I agree with Wynter as I had the same concern about having Matsumoto Jun in a lead role, but he ended up doing his usual act, not impressive but not bad enough either that it comes in the way of the story.
As for Takeuchi Yuko, she brings to the series the same great acting, romantic vibe and comedic quality that can be found in her other romantic comedies (Pride, Bara no nai Hanaya, Lunch no joou, etc.)

The one element that surprised me is the fairly realistic storyline. Although it is a romance and we would have forgiven some unrealistic development just to allow the love story to unfold, it stays in the realm of realism, particularly considering the special situation of a single-mother.

If you are looking for a well-done romance, this one will work for you

I was a little nervous about this one because MatsuJun was it, but I had faith in Takeuchi Yuko and therefore had some hope. I was not disappointed. Takeuchi Yuko played a great character really well and I loved seeing her in the role of a struggling mother. MatsuJun was sorta just there for the first half of the show, but he eventually grows on you and then things aren't so bad. Good show overall.

it was very enjoyable a must watch!