STORY
I think to the readers of Love So Life, my rating for its story may be slightly strange. Yes, although the story may be truly sweet and extremely cuddly, if you're looking at a more professional perspective, I would say that this story is currently being repeated many times in many other manga as well.

However I do think that the story is very original in the sense that the story delivers quite a new taste of cuddliness and true familial love from the graphics and characters - this is not found in many forms of Shojo manga (at least of those I have read), and what I find very unique about Love So Life. That unique familial love that is introduced in the very beginning of the manga, and the growing relationship between the two main leads, Nakamura Shiharu and Matsunaga Seiji. Of course, there's also the regular, unclear mystery behind the male lead. :)
I also think that some people may find that this manga is going to be quite slow-paced; you will get frustrated at times because the manga, no matter how cute the twins are, will focus on them for about two whole chapters and not mention a single thing about the main leads' romance. Which, made me quite irritated at times, but I did enjoy the little twins' stories at the same time.

So, now again I say: for the story I give a 7 - for its unique taste, sweet story, but because of its lack of originality and slow progression, that took away some of the points I would've liked to give.

ART
Now I have almost complaints on this one. I will admit that I'm not one for the really quickly, scribbled ink drawings of many Shojo manga; nor am I the one to go for the simplistic Shonen types like the early forms of Dragonball Z. But this particular manga, oh - it was delicious eye candy.
The mangaka really designed the characters and environment very well for this manga. I can believe that Matsunaga Seiji is an exceptionally hot man, and Nakamura Shiharu a beautiful young girl. The twins speak for themselves, they are definitely one of the cutest things that you'll ever feast your eyes upon in this manga!
What the mangaka does is make the line art for the characters quite simplistic; however because the eyes are always drawn extremely well and varies distinctively depending on the situation, and because often times the background environment accompanies the situation well the manga's art is definitely quite moving.
However, there is some flaw to this beautifully illustrated piece of work. Although very minor, I did have some confusion between some of the characters due to their similarity in appearance - such as Matsunaga Seiji and Miyagawa Takeru. In the beginning when the two characters are introduced, you might find that these two are incredibly similar and can be mixed up often, but that's a minor problem that is solved as you progress through the manga.

So, 9/10. :)

CHARACTER
I think that the characters speak for themselves. Please keep in mind that this is NOT a smut Shojo manga, therefore you will not get an incredibly hot guy trying to get into another girl's pants in every chapter. Instead, you will see an incredibly hot guy in a cute dilemma about whether to even lay a finger on the girl. Through this manga you will see slight character development, but much is focused on the character being static as the mangaka seems to want to represent many messages about life - with the characters being static, it makes them easier to be symbolic of things in reality, and help the mangaka deliver the intended message.

And so, definitely 9 out of 10. Again, because of my pickiness about individuality, I think that a 10 is deserving of the mangaka who can come up with a unique character that stands out from all other mangas out there as of now. So, 9. :)

OVERALL
I think Love So Life is one of the most cutest, sweetest, mangas I have ever read - legit. Once you pick it up, I guarantee you if you are a cutie-lover you will not be able to put this manga down. It is definitely delicious eyecandy and sweets for thought. It's a bit similar to Faster than a Kiss in terms of the 'girl staying in an older man's home; student-teacher relationship' storyline. However it does have a more unique taste to it compared to many, many Shojo manga I've read, so please take your time to consider this manga as your next treat for the following weeks (or days!) to come. ;)