So this manga comprises of two stories. And the only reason I gave this manga a 6 is because of the second story, i.e. the first story was appalling, and if it was only the first story, this manga would have gotten a 1. The second story was actually pretty cute, and dealt with the question every yaoi lover has wondered at least once: "what happens when the cute, little, stereotypically-girly uke grows up? Most likely, he won't continue to look like that." Actually, this a question I've had with too many shoujo works as well. I mean, I want to love the seme/non-girlyhalf of the relationship, but if he's attracted to a person who looks like a 5 year old, isn't that just a little creepy? Well, in this story we have the stereotypical yaoi couple (macho seme and cutesy uke), and the seme goes oversees so they don't see each other for 2 years. Now the uke is 18 years old, and he doesn't look the same at all. He's 180cm tall (5'9 for the Americans who haven't realized the world isn't going to wait for them :P). He's happy that his loving seme is coming back, but will he still like the uke now that he isn't a pedophile magnet anymore?
Yes, I do realize I've used those hateful terms (uke and seme) quite a few times in this review, but I think that it is appropriate considering this story is a satire based of the uke/seme trope.

My recommendation: either skip this manga entirely or just read the last 2 chapters.