Onegai My Melody

Onegai My Melody (Japanese: おねがいマイメロディ Hepburn: Onegai mai merodi, lit. Please My Melody) is a Japanese anime series produced by Studio Comet, based on the Sanrio character My Melody. The anime is directed by Makoto Moriwaki (High School! Kimengumi The Movie) and produced by Hideyuki Kachi and Kazuya Watanabe. The series was written by Takashi Yamada (Yumeiro Patissiere) with character designs from Tomoko Miyakawa. It ran on TV Osaka and TV Tokyo from April 3, 2005 to March 26, 2006, spanning 52 episodes.

Story
Kuromi, an escaped prisoner from Mari Land, has the Melody Key, an artifact with dream-corrupting powers, and she and her partner Baku have plans to gather 100 black notes to revive the Spirit of Dark Power. What for? To get back at her rival, My Melody, for the turmoil My Melody caused her (by accident, to be clear). When Kuromi ventures into the human world, she meets, teams up with, and even falls madly in love with Keiichi Hiiragi, a popular high school boy in Yumegaoka.

My Melody, with the Melody Takt, Melody Candies, and Melody Box in hand, ventures into the human world herself to gather 100 pink notes to stop Kuromi's disastrous plans. There, My Melody meets Uta Yumeno and her friends and they become partners in the quest to stop Kuromi's plans and save both the human world and Mari Land.