After the fairies defeated Gunala, the Evil Goddess, another crisis hit the Fairy Castle!! The magical energy of the world has been devoured by the evil wizards. The Rainbow Flower, the source of the magic power, is soon to wither, and this will destroy the world of Fairy Castle. Only finding the legendary Rainbow Heart Stone and letting it recollect all the essential energy can save the world. To solve this biggest crisis in the history of the Fairy Castle, Prince YouLe, Sally, and their new friend XiaoQian, have to go back to the human world and reunite with Maggie and Michelle to fight the evil again. (Source: Mahou Shoujo Wikia, edited)

The kingdom of Gemini is attacked by the evil Queen Halle. The twin princesses of the kingdom are missing, so is the important Night Star Box, which has affected planets including Earth. The fairy Queen had sent Prince You Le and Sally to Earth, looking for the Night Star Box with the help of Maggie and Michelle. Then the gang found out one of the girls who takes dance lessons with Maggie and Michelle is one of the missing princesses, Bei Bei! The mission to find the Night Star Box and the the still missing princess, Ya Ya, is now on the shoulder of the fairies. (Source: Mahou Shoujo Wikia, edited)

Fourteen-year-old Yukio "Koyuki" Tanaka is a dispirited young boy with no goals in life. However, this all changes when Koyuki saves a strange-looking dog named Beck from being harassed by a group of local kids. The dog's owner, 16-year-old Ryuusuke "Ray" Minami, is an emerging guitarist and the former member of a popular rock band. After Koyuki meets Ray again in a diner, the older boy leads him to his former band's meeting place and dazzles Koyuki with his amazing guitar skills. Slowly becoming interested in the glamour of western rock culture, Koyuki decides to start playing the guitar while helping Ray achieve his dream of leading the ultimate rock band. Together with Ray's younger sister Maho and a few other members, the two boys launch their career into the world of rock by forming a band called BECK. Beck follows the group's struggles and successes as they spread their fame across Japan. [Written by MAL Rewrite]

Ishiyama High is a school populated entirely by delinquents, where nonstop violence and lawlessness are the norm. However, there is one universally acknowledged rule—don't cross first year student Tatsumi Oga, Ishiyama's most vicious fighter. One day, Oga is by a riverbed when he encounters a man floating down the river. After being retrieved by Oga, the man splits down the middle to reveal a baby, which crawls onto Oga's back and immediately forms an attachment to him. Though he doesn't know it yet, this baby is named Kaiser de Emperana Beelzebub IV, or "Baby Beel" for short—the son of the Demon Lord! As if finding the future Lord of the Underworld isn't enough, Oga is also confronted by Hildegard, Beel's demon maid. Together they attempt to raise Baby Beel—although surrounded by juvenile delinquents and demonic powers, the two of them may be in for more of a challenge than they can imagine. [Written by MAL Rewrite]