Moritaka, a junior high student, forgets his notebook in class. His classmate Akito notes Mashiro's drawings in it and asks him to become a manga artist to his stories. Mashiro declines. Takagi incites Mashiro to meet with Miho Azuki, Mashiro's crush, and tells her the two plan to become mangakas (manga artists). In response, Azuki reveals her plans to be a voice actress. Mashiro proposes to her that they should both marry when Azuki becomes a voice actress for the anime adaptation of their manga. The two then start creating their manga, under the pen name Muto Ashirogi, in hopes of getting serialized in Weekly Shounen Jump.
If you have any sort of interest in manga, Bakuman is definitely a movie you should check out. It started out as a manga series of its own, created by the same team behind Death Note, another amazing manga and later animated series. Bakuman follows two students behind the stressful scenes of drawing manga for a big publication, and have a lot of fun with it too. It was super interesting to learn exactly how a series is developed and finalized, and while there's also a story of rivalry and friendship going on was great.