When Ryo, a young magazine reporter, moves into a new apartment he is greeted by the passionate sounds of his astonishingly beautiful neighbor Satsuki. Realizing the wall dividing their apartments is paper thin, the captivated journalist begins to eavesdrop on every detail of the girl next door's life: her conversations, her bubble baths... her breathless cries.

Maki Asano works as a secretary in the Teito Heavy Industries Development Secretariat. However, that is just her public face, and Maki's real job is as a special secretary directly under an executive. Maki receives a mission from the managing director to "recover important secrets that have been leaked," and she begins her investigation with her partner, former detective Kawasaki...