Happy Lesson

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.

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