Ultra Maniac is a Japanese romantic comedy manga series written by Wataru Yoshizumi. It features two eighth grade students named Ayu Tateishi, a tennis club member, and Nina Sakura, who is actually a trainee witch from the magical kingdom.

Shy Ayu Tateishi has just made a new friend at school. But this new friend, much to her surprise, is no ordinary classmate. Nina Sakura may look like a normal middle school girl, but she's got a big secret. She's a witch. Or, rather, she's studying …

Ultra Maniac (ウルトラマニアック Urutora Maniakku) is a Japanese manga series written and illustrated by Wataru Yoshizumi. The series was serialized in the manga magazine, Ribon from February 2001 to January 2004.

The romantic comedy series features 7th grader Ayu Tateishi, a tennis club member, and her transfer student friend, Nina Sakura, who is actually a trainee witch from the magical kingdom. Shy Ayu Tateishi has just made a new friend at sch… When Yuta, a boy from Nina's home-dimension, enrol… But being a witch-in-training isn't as easy (or fu…

Ayu's carefree days are interrupted by the appearance of Nina Sakura, a new transfer student who turns out to be a witch. Nina, who left home after failing an exam at her school in the Magic Kingdom, quickly latches onto Ayu and becomes her best friend.

Sakura Nina, a magic girl from the Magic Kingdom, comes to the human world to continue her training. It would have been a simple scenario, if not for the fact that Nina's magic skills are subpar at best.

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Now enrolled in a Japanese middle school, Nina is hoping to improve her grades, make some friends, and practice love spells on her unsuspecting new classmates. Shy Ayu Tateishi has just made a new friend at school. But this new friend, much to her surprise, is no ordinary classmate.

Shy Ayu Tateishi has just made a new friend at school. But this new friend, much to her surprise, is no ordinary classmate. Nina Sakura may look like a normal middle school girl, but she's got a big secret. She's a witch. Poor Ayu just wants a simple love potion to get ...... MORE Shy Ayu Tateishi has just made a new friend at school.

Nina Sakura is a main character Nina told Ayu Tateishi that she is a Magic Girl from the Magic Kingdom because Nina felt that she could trust Ayu and the two become best friends. Later on she tells Hiroki and Tetsushi. Later on in the manga Hiroki becomes her boyfriend. She strives to make Ayu happy and would do anything for her.