Happy☆Lesson Advance
Japanese title: HAPPY☆LESSON ADVANCE
Type: TV
Episodes: 13
Premiered: summer 2003
Source: Manga
Genres: Comedy, Romance
Studios: Studio Hibari
Producers: KSS
Duration: 24 min per ep
Rating: PG-13 - Teens 13 or older

Hitotose Chitose is now living together with his 5 teachers as his mothers when a mysterious girl appears and becomes their neighbor which turns out that that person is Nagatsuki Kuron who wants Mu-chan to be her mother so another sibling rivalry ensues as to who would end up as Mu-chan's child.

(Source: ANN)