I watched this and the series version side-by-side. Apart from a few scenes that were switched around, both versions are identical; the movie feels more like a cohesive whole since it isn't interrupted every few minutes. If you want to watch this, you should choose the movie if you can.

What I liked:
* the beautiful scenery at the ocean
* the simplicity of the story
* Han Gi Chan's acting
* Also, stories that are not set in highschool or college are always welcome.
* The Ex-boyfriend. It was a nice touch, not to know at the beginnning what to expect from him, and to discover in his third scene what he is actually like.
* The story didn't make use of the typical BL tropes, only standard romance tropes. The gender of the two protagonists actually did not matter much, which is always nice, if you want a light romance.

The story though has some qusetionable parts:
* I have so many questions: Where does Tommy come from? What is his motivation in staying with Ba Da? -- Why is Tommy there, right behind the car, at the beginning? Was it an accident, did he get in the way intentionally, did he just lie down there? -- Why does a chef buy at the grocery store?
* The gap year -- Why should two adults not know to try a long-distance relationship? What did Ba Da do while he was not at his small establishment and why did he decide to come back? What was the motivation for Tommy to return, and why at this point of time?

Holland's acting is, unfortunately, not suited for his role. I'm sure he did his best, but it seemed stiff to me, and even after rewatching I'm not always sure how his character feels. Especially since we only get Ba Da's POV, and Tommy doesn't really talk about his life, we have to rely on body language. I didn't, for example, notice that Tommy actually comes on to Ba Da until I watched the story for the third time.

Overall impression:
This is a nice and simple story, that focuses on few characters, sets and a single storyline. It didn't waste time on too many flashbacks or scenic shots, just enough to set the mood. The makers obviously used what they had wisely and tried to make a good story within the short time of an average movie.

I still would have wanted more info, be it explicitely stated or implicitely shown, to understand the motives of both main leads. Things are often too subtle to see them during a casual watching, or did you notice that Ba Da says in minute 33 of the movie "I didn't come here to do this?" and probably means that he notices a certain kind of attraction to Tommy? I didn't, and there are some other points where I'm really not sure if we get the intended message.
That subtlety doesn't mix particulary well with Holland's acting style.

Still, it's a nice movie to spend a lazy afternoon or evening on, even worth a rewatch or two, if yu need to shut off your brain. It's not an outstanding masterpiece but certainly better or at least not worse than some het romances.