Happy☆Lesson The Final
Genres: Comedy, Romance
Type: OVA, Episodes: 3
Aired: May 25, 2004 to Oct 22, 2004
Studio: Studio Ranmaru
Source: Manga
Rating: PG-13 - Teens 13 or older
Synopsis:
When Mitsuki learns that the highschool is going to destroy the old school building, she is saddened at the thought of so many memories being erased. Chitose and the rest of the moms spring into action to stop the demolition. During their efforts, Fumitsuki, Chitose, and Mitsuki finally realize their true feelings.

(Source: ANN)