The supporting cast can be a bit forgettable apart from Fujiama, the grandfather of one of Cherry's friends. Both characters are very simple but both feel like real characters living with their basic problems, and seeing their interactions with each other and the rest of the cast. Cherry, a Japanese haiku poet with a lack of wanting to share his haiku's vocally and hides behind his headphones to make people not want to talk to him and Smile, who is a successful online personality with a personal crisis with her bucked teeth which she wears a mask to protect herself from potential embarrassment. It is also a major part of the show as the whole show resolves around the theme of music. The show's background themes brighten up the anime in a bright, colorful way which I expected for it being made by Kensuke Ushio, who also did A Silent Voice and Liz to Aoi Tori. The scenery at the points it need to happen were done well though at times it felt like it was panning a bit slow.

There is always a moving part on the screen and even things like a book falling over on the ground is shown in a bright matter. The characters are animated very stylishly and their facial reactions are very diverse and helps paint a picture of what the personalities of the characters are, even though they might be a tad overdramatic. The art style is done spectacularly, it flows really well between the more actiony scenes and the calmer scenes, with it matches the aesthetic of the show beautiful. It does have some predictable moments like how both of the main characters meet and what they do but overall with those predictable moments, they didn't really deviate from the overall story's quality and didn't really affect the overall enjoyment of the film. the moments where something special happens become even more special. It's nothing too out of the ordinary for a SoL show which makes The story was consistently good throughout the anime, though following a traditional structure to where the high or low points of the story was. It also has emotional value when it needs to, it nearly made me cry twice during the period of the film.

Though some of the plot points in the show can be a tad bit predictable, it doesn't mind much due to it's great character and incredible animation. Words That Bubble Up Like Soda is a relaxing music love based story which does what it achieves very well.

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