Mahoutsukai Tai! (TV)
English name: Magic User's Club
Genres: Comedy, Fantasy, Romance, Sci-Fi
Type: TV, Episodes: 13
Aired: Jul 7, 1999 to Oct 6, 1999
Studio: Madhouse, Triangle Staff
Source: Unknown
Rating: PG-13 - Teens 13 or older
Synopsis:
The aliens have been defeated, and the Bell has been transformed into a gigantic cherry tree. Now, the brave Magic User's Club must reconvene to deal with a new problem. Apparently, some inconsiderate persons left a skyscraper sized cherry tree in the middle of Tokyo, and it's become a major inconvenience to everyone in the city. Even though they have no idea who could have done such a thing, the Club feels strangely responsible and springs into action. Meanwhile, a mysterious person is spying on the magic club in the form of a small boy. 

(Source: ANN)