[Anime Movie Review] Fireworks, Should We See It from the Side or the Bottom? 打ち上げ花火、下から見るか? 横から見るか?

I could say only just recently I become interested in the anime which doesn't have many episodes, only one movie.
Another one I watched is Uchiage Hanabi, Shita Kara Miru Ka? Yoko Kara Miru Ka? which means, fireworks, should we see it from the side or bottom.

The main idea about this anime is about daily life of some high school students.
One day, Shimada Norimichi, a boy in the high school which is the lead main character in the anime, went to the pool with his friend, Azumi Yusuke. They were in charge of cleaning the pool, when unexpectedly they met Oikawa Nazuna, a quiet girl in their class which they found quite charming.

 Shimada Norimichi

Azumi Yusuke

Oikawa Nazuna

The three of them decide to do swimming competition. Nazuna intended to ask one of the winner goes out to see the fireworks in the festival tonight. Yusuke won the competition and was being asked by Nazuna. On the other hand, the boys from the high school was arguing about how a fireworks look like if it's being seen from the side. They tried to prove if it's flat or round tonight too.

 
Due to some shock, Yusuke reject the offer by avoiding Nazuna. Nazuna didn't know and met Norimichi while waiting for Yusuke. Nazuna said that she was hoping that Norimichi was the one who won the swimming competition. Later, Nazuna told her story that her mom is going to remarried for the third time and they are moving to another city. Nazuna escaped from the home, but soon captured by her mom. Norimichi who cannot help Nazuna, desperately throw something like a glass transparent
ball which was found by Nazuna in the morning, and suddenly the time is rewinding.

Norimichi went back to the time where they were still in the swimming pool. Norimichi then started to change the future one by one, a little by a little.

When I saw the title of this anime movie, I was interested as I have heard of it before, even though I've never watched it. After I watched it, the only comment I could say is "Another time slip? Another going back in time?",as before, I watched Kimi no Na Wa, and the concept is just very similar and it was released not a long time ago too.
I wonder, is it because this is the second time I watched an anime movie with the same concept that I became not interested in it?
Well, I don't know, but I gave this anime movie 4.5 out of 10 points. I wonder if I would give a better points if I watched this first before Kimi no Na Wa.