Storyline: Well, basically, this Manga is about Kengo and his best Friend Hidetoshi. Hidetoshi told Kengo that he's gay on Graduation Day, and even though Kango realized that he might actually be in love with him, he sticked at being friends. After several years pass and seeing Hidetoshi in several abusive relationships, Kengo starts to date him. I must say I quite enjoyed this Manga, because the story was, while of course being dramatized, it still had the kind of feeling like "ahh, this could actually happen in real life" Kengos character was nice, he explained his confused feelings about his friend, seeing him getting beaten and realizing his ownprotectiveness and love towards him.
Hidetoshi's character was a bit annoying sometimes, because he was very insecure and doubting.
But while that got a bit under my skin, his behaviour is pretty much how I can imagine a person in his position would be.
Other than those two, there were barely any other charcters, the story is focused mainly on them.
The troubles of homosexual people were also mentioned, but while it got clear that he had problems with his family because of it, it doesn't get overbearing.
It only contributes to the realistic feeling.

The art was alright, you might even call it nice...
Overall, it suited the story. (a overly cute drawing stile would look kinda out of place)

I tried not to make to many spoilers and I really recommend this Manga if you're looking for a cute, realistic and maybe a bit more mature love story that isn't too much about figuring out your feelings, but establishing and mantaining a relationship regardless if hetero/homosexual.

...It kinda makes you feel more mature , youself... ;) haha!
....come on, you know you wanna try it!