Naoe-kun, a massage therapist, is about to head home for the day when he's saddled with a rather strange patient. This lovely lady has emerald eyes, pointy ears, and grew up in the forest—everything about her screams "elf," except for one thing: her bodacious body. It turns out she left her world but loves junk food in this one, and now her obsession has caught up with her. Can Naoe-kun help this loveable elf girl lose the weight—and keep it off?

Qin Ze is a young man who has just entered university. From an early age he excels in singing but following a trauma, he is no longer able to sing in public.

Debutante Detective Corps begins with introductions to the five main characters, Miyuki, Reika, Youko, Nina, and Kimiko. It seems these five girls are incredibly rich and have been sent a threatening video tape by forces unknown. A police guard is set up at the school where the girls have enrolled. Kimiko, however, doesn't like the idea of being cooped up at school, and convinces the rest of the girls to trick the police into leaving. No sooner are the police gone, however, then the girls are assaulted by three armed terrorists. What ensues is a rather silly escapade with our heroines attempting to thwart their attackers.