Story
The highlight of this manga is it's story. It's not necessarily completely unique in premise, but the way it treats its subject matter is what makes it stand out from the pack. Motoi Yoshida presents Koshiro and Nanoka's relationship in a realistic and powerful manner. Humor is also provided whenever appropriate.
Art
The character designs are all pleasant looking and very distinct from one another. Expressions are always drawn well enough that you can know how a character is feeling. The backgrounds don't show much detail for the most part, unless a scene is being introduced. Overall, the style is a bit simplistic, but this fits the story and setting well.
Character
The two main characters are both fleshed out well throughout the 5 volumes. Readers are able to get to know them and understand their emotions. The supporting cast is small, but each character was given a unique personality without resorting to stereotypes. As Koshiro and Nanoka are the main characters, there are only a handful of scenes which don't involve one or both. However, everyone in the cast plays a role in their development.
Enjoyment
Motoi Yoshida keeps the story going at a leisurely pace and allows the manga to use it's 5 volumes to their full extent. Nothing feels too rushed, but I never had the desire to skip ahead a few pages or got bored either. It's very consistently written, so after reading a couple chapters, you should be able to decide if it'll hold your interest.
Overall
I'd highly recommend this manga to anyone who is looking for a refreshingly new and realistic take on romance.
7.5 out of 10