A group of five girls and one guy living under the same roof - it may be a well-worn concept, but it's a timeless one. Happy Lesson gives a lively spin to this classic genre. Chitose is the lone male resident amongst five ladies. While having so much female company may seem like a dream come true to some, too much of a good thing can be overwhelming. Plus, these ladies happen to be his school instructors (hence the name of the series). In addition to being the target of their antics at home, he endures their antics at school as well. Even when the day is done and everyone settles in, there's still not enough room for everyone, and Chitose is relegated to sleeping on the couch.