Saru Lock (猿ロック, lit. "Monkey Lock") is a manga by Naoki Serizawa. It was adapted into a television drama in 2009 and a live action film in 2010.
Yataro Sarumaru, nickname "Saru" (Hayato Ichihara) is an average high school boy who daydreams about idols but otherwise has no luck with girls. While working with his father, a locksmith in Asakusa, Tokyo, he has gained exceptional skills to pick just about any lock. Using his exceptional skills, Yataro then finds himself solving various mysterious cases, while also trying his luck with the girls.