Wonderful in all aspects.
The storytelling is simple, yet captivating. It doesn't have any unnecessary scenes that mess up the plot. The flow from one interaction to another is smooth with no hitches. Even pacing at just the right places. But most importantly, it gives valuable life lessons in the most simplest of ways.
The art is beautiful, with vivid expressions of exuberant characters, and subtle yet meaningful touches of smiles from less expressive characters. The way the author drew the art the way Machida sees it, makes you fall in love with the world as well.
But the best part of the manga are the characters. They're complex people with real problems and different circumstances, who have character development. The way the author presented them felt very realistic, down to their line of thought and expressions. Machida is an amazing character and one you would also wish to be friends with, or at least have someone exist who is just like Machida. But even better, because of the main character, he makes you want to be a better person.
Overall, an exquisite and rare gem that is worth your time to read.