Nanako Matsushima was the comeback story of 2011 with her starring role in the hit Nippon TV drama "Kaseifu no Mita" ("Mita the Housekeeper"). Fuji TV is hoping the magic lasts with its new Monday night series, "Lucky 7" (9 p.m.), which features Matsushima as a regular "special guest."

She plays the president of a Tokyo private-detective agency. In the premier episode, the company follows a young man believed to be having an affair with a client's wife. In the end, the lad, Shuntaro (Jun Matsumoto), is employed by the agency as an intern.

In this week's episode, Shuntaro and one of the detectives, Nitta (Eita), are assigned to investigate the business dealings of a company called Stellar Bio. Because of his science background, Nitta is able to convince Stellar's president, Sasaoka (Lily Franky), that he's a fellow researcher.