I'm actually a really big fan of the anime series and wanted to compare it with the manga... and I think perhaps the story works best in the animated medium due to the central focus on the food within the plot. I think the adaptation is very faithful but due to the limited pages within the manga, it does limit aspects of the plot to it's barebones.

From the name, you get an honest description of what this series is about: a girl who really loves ramen. There isn't really much plot or development beyond that except for bits of characterizations mentioned in passing about other characters within the manga but for the most part, Koizumi is an enigma and all you know about her is her deep love and knowledge for ramen. It's not a deep read but as a foodie and lover of ramen as well, I really like the series. As they only made 12 episodes of the anime, I'm switching to the original text to continue with this series.