Baccano! [AniDB]
Baccano is Italian for noise, but Narita translates it as "stupid commotion." Each of the stories in the series involves several unrelated plots intersecting and crossing each other as events spiral farther and farther out of control. Immortal alchemists, mafia operated speakeasies, and many other elements of pulp fiction mashed together for a world straight out of the movies.
Nodame Cantabile [AniDB]
At a top music academy in Japan, Shinichi Chiaki's arrogance is matched only by his top-notch piano playing. But when Chiaki and the teacher get into a fight, he's demoted to the reject class. Chiaki is left to pursue his dream of being a composer while surrounded by a bunch of loser musicians and one annoying girl, Noda, who has proclaimed herself Chiaki's girlfriend. It doesn't help that Noda, who insists on being called Nodame, lives right next door to him.