Baku forgot which episode was Kuromi's birthday.

The thirtieth episode. Baku is from "Magic Melody", and its "Forget the Birthday of Black Tail" is the thirtieth episode. This cartoon is a Japanese animation based on Sanrio's MyMelody doll, which was produced by Comet Studio. In the film, the prisoner Clomi escaped from the prison in paradise, Maryland, and came to the human world with melody keys. Melody, who was misunderstood by the royal family and helped Kolomy escape from prison, was sent to the human world by the king to stop Kolomy from taking away human dreams. Melody got an Melody baton and collected 100 pink notes, thus starting his journey on earth.