Grand Blue Dreaming

Basically what my review title says. If you can tolerate the running gag of the male characters being naked for 90% of the time (their bits are censored, though), as well as other forms of fanservice, then there's a lot of fun to be had, and the series does have its heartfelt moments. While not particularly deep, the characters are entertaining, and the vibe of the series is similar to a high-school comedy, but with significantly more nudity and drinking.

For those expecting a diving manga (like me), however, that element is there and is taken seriously when the author gets around to it, but it doesn't seem to be the priority from what I've read so far.