Happy Lesson is a comedy manga, written by Mutsumi Sasaki and illustrated by Shinnosuke Mori, serialized in Dengeki G's Magazine from April 1999 to September 2002, featuring a high school student who is adopted by five of his teachers. It was adapted into a five-part OVA series in 2001; a thirteen-episode animated TV series in 2002; a sequel TV series, called Happy Lesson Advance, in 2003; and a second OVA series, Happy Lesson: The Final, in 2004. The series has also been adapted into a series of drama CDs and a Dreamcast game.
The first volume of the manga was licensed and released by A.D. Vision's ADV Manga label in the United States; the first three episodes of the OVA and the first TV series were licensed by the ADV Films label for Region 1 distribution.
The plot of Happy Lesson is based on five teachers who end up living with a troubled and indifferent orphan and their unusual plan to become mother figures in an effort to make him a productive student. To achieve their plan, they employ various methods, such as science experiments, spiritual cleansing, physical training, and hijinks.
Resembles a harem anime.
Aside from the male lead, the main female characters follow a distinct scheme in their names. Their surnames are listed off in numbers, from 1 to 10. Furthermore, those characters have the archaic names of the months as their given names; for example, Mutsuki means "January", Kisaragi means "February", and so on.
Chitose Hitotose
Voiced by: Daisuke Kishio (Japanese), Josh Meyer (English)
A high school orphan who has moved into his deceased parents' house by himself, but not for long as each of his teachers recognizes his slipping grades and decide to secretly move in with him, becoming his "Mothers".
In the beginning of the series, it is shown that Hitotose is very good at fighting, as seen when he beats up two guys who were making fun of him because he has no parents; later on, in Happy Lesson Advance, we see his ability to fight numerous times during his conflicts with Nagatsuki Kuron.