If you're looking for anime similar to Grand Blue, you might like these titles.
Rinko Sakuma thought she was working for a regular detective agency, but two months into her new job she learns that her employer, Akutabe, is actually a demon summoner who calls creatures from the depths of hell to carry out revenge for his clients. Rinko’s first experience of a demon comes in the form of Azazel, a devil whose power is to incite lust in return for an offering of food. Unfortunately, as if being harassed by the flirtatious demon isn’t enough, Rinko has been forced to into signing a contract with him for eternity! Now the innocent office worker must work with Azazel, the fecal gourmet Beelzebub and a whole host of equally deranged devils to complete jobs for the agency; though with the demons' habit of bungling tasks and making the situation worse, it won’t be easy...
Chiyo Sakura, a high school girl who fell in love with the unrefined boy schoolmate Umetaro Nozaki, decides to be courageous one day and asks him out. Her feelings weren't conveyed properly, and before she knew it she ends up helping a particular job of his as an assistant... The series is a shojo manga boy comedy which centers around Nozaki, a high school boy that is a popular shojo manga artist, and has a story woven by very individualistic characters.
Nitta Yoshifumi, a young, intellectual yakuza, lived surrounded by his beloved pots in his turf in Ashikawa. But one day, a girl, Hina, arrives in a strange object, and uses her telekinetic powers to force Nitta to allow her to live with him, putting an end to his leisurely lifestyle. Hina tends to lose control of herself, wreaking havoc both at school and in Nitta's organization. Though troubled, he finds himself taking care of her. What will become of this strange arrangement? It's the beginning of the dangerous and lively story of a nice-guy outlaw and psychokinetic girl!
With a history of leading a motorcycle gang and getting bad grades in school, why would 22 year old Onizuka ever want to become a teacher? Is it to educate young minds or spread the joy of education? Sure, if it involves being able to look up high school girls' skirts! Watch as this would-be educator uses his own life lessons and unconstituted methods as a means to control a delinquent class of students -- students who certainly aren't as happy to have him as a teacher as he is happy to be teaching...
Sousuke Sagara is far from the average high school student - not only is he highly trained in military tactics, he puts his knowledge to use in every single applicable situation (and even those nonapplicable ones.) So, when confronted with high school, he tends to turn average high school experiences into off-the-wall adventures. Love letters become terrorist threats and field trips become commando operations; his survival depends on the watchful eye of his best friend and classmate, Kaname. Together, they may just make it out of high school alive...
If you liked Full Metal Panic? Fumoffu or Grand Blue, then you will like the other one because both share the Gag and Slapstick tags as there main style of comedy. In very different ways, which is mainly due to the premise of each anime, they both deliver some serious laugh-out-loud moments.
All Asakura wants is to graduate and become a high school teacher, but not for the reasons you’d expect: he wants to be surrounded by boobs - ample, bountiful boobs. But Asakura’s goal of mammary immersion won’t come easy, as his best friend Ishida is determined to open a flower shop with him once they graduate - that is, if they manage to graduate. Together, the duo navigates day-to-day school life with crass, whether they’re ogling their busty teacher, taking on part time jobs or dodging assassination attempts by robots.
The story follows a third-year high school girl who likes building plastic models and the wacky conversations she has with her fellow club members.