Midnight Secretary follows the life of Kaya Satozuka, the private secretary of Director Kyouhei Touma of the Touma Company, and the secrets kept between them.

    One day Midori meets a boy called Hino Tsukasa, who came to the island she lives on for a holiday. He teaches her to play soccer and she falls in love with the sport. Midori is inspired by Tsukasa and continues to play soccer in hopes that they would meet again someday. When they do meet again Tsukasa does something unforgivable. Determined to defeat Tsukasa on the soccer field Midori enrolls in an all boy high school.[From Baka-Updates Manga]