HAPPY LESSON

is a Japanese media-mix project produced by Dengeki G's Magazine. The manga adaptation was written by Mutsumi Sasaki and illustrated by Shinnosuke Mori, and serialized in Dengeki G's Magazine from April 1999 to September 2002. The series was discontinued with 20 chapters serialized and 14 chapters released in two volumes. The third volume was never published.

Synopsis
One guy. Five girls. One roof. It's a recycled idea, but it never gets old. Happy Lesson is a kinetic take on an old genre.

Chitose shares his house with five ladies. One might think the continued attention of this many girls would be a good thing, but too much attention can prove to be painful. Did I mention they're also instructors at his school (hence the title)? Not only is he the subject of their abuse at home, but at school as well. Even when things finally calm down at night, all the rooms are taken so Chitose must sleep on the couch.

Characters

 * Arisaka Susumu
 * Ichimonji Mutsuki
 * Ninomai Kisaragi
 * Sanzenin Yayoi
 * Shitenno Uzuki
 * Gokajo Satsuki
 * Rokumatsuri Minazuki
 * Nanakorobi Fumitsuki
 * Yazakura Hazuki
 * Kuron Nagatsuki
 * Togakushi Kanna

Anime
An anime adaptation of the manga series was released as an OVA, followed by a 3-season anime series from 2001 to 2004.
 * see: HAPPY LESSON (Anime)