The entire concept of the manga is simple; the plot is simple, the characters are simple, and the artwork is simple. However, don't let that turn you away from this lighthearted and somewhat predictable series. In this case, the simplicity is good, almost refreshing and combines for an overall enjoyable and heartwarming manga.

Story: 6/10
The story, like everything else, is simple. Kouta is your average 13 year old boy, nothing remarkable about him. His dad suddenly leaves because of work, leaving him alone for 6 months. On the same day, he meets a beautiful and eccentric 17 year old high school girl who suddenly decides to live with him. There is no real plot and the chapters are episodic and mostly focus on the progressing love triangle (or even square) between Kouta, the middle school "idol" , the female lead Natsuki, and even Natsuki's younger sister.

Art: 7/10
Not much to say here, the artwork is decent but simple. It won't amaze you but it's not bad either. Just simple.

Characters: 8/10
Like everything else so far in the series, the characters are fairly simple. The one exception is Natsuki. She is very eccentric and quirky and is a big reason why the manga is so enjoyable.

Enjoyment: 10/10

Overall: 8/10
I thoroughly enjoyed the series. In case you didn't notice, the main focus throughout this review is the manga's simplicity. The series has a very lighthearted but bittersweet feel to it, which is only magnified by the happy but somewhat melancholy ending. The two things that could have made the manga a lot better is if the artwork was a little flashier and if the relationships between the characters (especially Natsuki and Kouta) were developed a little more. This is one of those rare series where everything is so simple it turns out to be a great and refreshing read.