What really gives the 10 to Grand Blue is how they nail college life. Of course, there are many exaggerations, but there are 3 easy counter-arguments for that. First: most anime/manga exaggerates a lot about its main theme anyway. Second: it is a comedy, so it's kinda necessary. Third: It's not nearly as exaggerated as you might think if you haven't been to college or had a quiet students life. This guys really nailed the spirit of college students. The suicidal drinking, the proportion of what they show between classes and partying (like one in every 20 chapters is actually related to studies). Later on, when things get serious and the seniors have to actually start studying and doing projects that take all of their time, and start spending less time with the younger students, bringing both sadness over the brutal abyss in their reality and terror since this seemingly infernal life is only a couple years away. Not that it is that difficult, but they really represented the entire essence of college life, while delivering some of the best comedy I've ever seen.
Since I like to rate stuff based on how well the authors managed to deliver what they propose, how well its artistically made and how much I personally like it, there is no real argument to not give this a 10.
