About “Happy★Lesson”
Happy Lesson is a comedy manga series written by Mutsumi Sasaki and illustrated by Shinnosuke Mori. It was serialized in Dengeki G's Magazine from April 1999 to September 2002. The story follows a high school student who is adopted by five of his teachers. The series was adapted into a five-part OVA in 2001, a thirteen-episode anime in 2002, and a sequel called Happy Lesson Advance in 2003. A second OVA, Happy Lesson: The Final, was released in 2004. The series also has drama CDs and a Dreamcast game. (Summary adapted from Wikipedia, CC BY-SA 4.0.)
Some summaries adapted from Wikipedia, CC BY-SA 4.0.