Happy☆Lesson (TV)
Genres: Comedy, Drama, Romance
Type: TV, Episodes: 13
Aired: Apr 1, 2002 to Jun 30, 2002
Studio: Studio Hibari
Source: Manga
Rating: PG-13 - Teens 13 or older
Synopsis:
Hitotose Chitose was always alone and untrusting of people but when 5 female teachers appear and started living together with him in his family's house as his mothers, things started to change and pick up, together with Hazuki-nee and Minazuki (his 2 sisters) everyday is a lesson. 

(Source: ANN)