Cast/Acting:
There are some awkward moments, the acting isn't perfect, but I guess it's a pass since the last scenes got better and given that it's adapted from shoujo manga, the pacing is reeaal slooow that it makes it awkward

Story:
So, I did like the manga/anime a lot back then. Tho if I really think about it now, the plot is 1 big loophole. And there's just a few things that are totally out of place. Pointing them out would be spoiling the plot. Either way, the story was presented quite nicely in the movie and my rating is based on the few plot twists that are questionable. So like, is it ok to rate the movie this bad because I didn't like the questionable plot twists? Well, I think so, yeah, since the movie is loyal and didn't deviate much from the original. And tbh, I kind of wished it's not about character trauma and more on character development (it's all the questionable plot twist's fault)

Overall:
The OST is nice. Kento is handsome. The other cast did great. Tao Tsuchiya is ok. The acting can be improved. The story can be blamed on the original manga plot.

Is it worth watching?
If you like drama and slow-paced shoujo, it's not a waste of time. You might question the plot tho, if you haven't the slightest idea of the story (like I did just now after being brought a blast from the past that the younger me didn't see/realize).
Watch it if you're a fan of the genre (and Kento).