Full Metal Panic

I watched the first two seasons and thought it was awesome. Full Metal Panic is pretty much a mixture of everything. It has elements of sci-fi, fantasy, romance, action, and comedy. So, it has a wide audience range.

The story starts out, a young Sargent Sousuke of a mercenary group, is ordered to protect a high school girl in Japan from mysterious kidnappers. While this guy is an expert on anything military, he's pretty much an idiot in every other subject. Sousuke enters the girl's high school as a fellow student to keep watch over her. However, it's quite obvious to Chidori, when he starts stalking her, that something's up.