Happy☆Lesson The Final
Japanese title: HAPPY☆LESSON THE FINAL
Type: OVA
Episodes: 3
Source: Manga
Genres: Comedy, Romance
Studios: Studio Ranmaru
Producers: KSS
Duration: 30 min per ep
Rating: PG-13 - Teens 13 or older

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)