The story focuses on high school girl Nagisa Yukiai who lives in a seaside town. She has believed her grandmother's story that spirits dwell in words and they are called "kotodama" (word spirit). One day, she strays into a mini FM station that has not been used for years. As an impulse of the moment, she tries to talk like a DJ using the facility. But her voice accidentally broadcasted reaches someone she has never expected.
I'm not sure if this is actually an adaptation, but "Kimi no Koe wo Todoketai" sure feels like one. You can almost see before your mind's eye the numerous subplots cut and character development missed during the film's roughly 90 minutes of runtime. It feels like a small slice of a much bigger whole, trying to do much but ultimately accomplishing little.
The story has way too many characters, and thus most of them remain largely undeveloped. Their personalities and roles can be described in a single sentence. Heck, the girl with the pigtails seems to serve absolutely no purpose aside of serving cookies to the
others and being shy. The plot itself also seems to go in way too many directions for its own good, attempting to juggle numerous plot threads at once (just to name a few: the comatose mother in the hospital, the estranged childhood friends, the amateur radio station, the main protagonist's plans for the future), but ultimately not giving most of them the time and attention they deserve.
The art style is... let's say minimalistic. It was hard to tell at times whether I was watching a series or an actual film; if this actually had a significantly bigger budget compared to you everyday anime, they didn't do much with it. It surprises me, because I tend to associate the Madhouse studio with higher quality.
That said, the film is not at all unwatchable. It's more like a "cute trainwreck"; the overall message and content is generally fun and heartwarming, but behind it all seems to hide a one-cour series or OVA that would have had enough room to do this concept justice, and which never actually got made.