Since there are a lot of reviews from people who only watched the movie, I decided to help out those who read the manga and are thinking about watching this.

Well, I read the manga and, maybe for this reason (since I already knew the ending), I actually enjoyed the movie a lot more than the manga itself. The manga gave me huge SLS because the second lead and the female lead relationship was much more developed in the manga (or probably is just Yamazaki Kento bias wrecking anyone even though his character is a coward - I think I'm just in love).
Also, maybe because I was expecting to hate the FL as much as I did reading the manga, I didn't find her as unbearable in the movie.

It looks like I hated the manga, right? Haha! But I actually really enjoyed reading it, just the ending had me go crazy.
Anyways: if you read the manga, do watch this! I like it even better because, even though is shorter, it develops the story in the right places so you won't get as frustrated :)