Satuki works as a physical education advisor, excels at sports and looks the part with an athletic build. Yayoi works in the university medical department and Uduki advises you on the fine arts. Two other mother figures teach you about chemistry and literature. A girl named Minaduki who also lives in the dorm gets a tad jealous of all the attention you get and acts as a sort of rival for the affections of the teachers. Happy Lesson plays in the style of an interaction game where the feelings of the other characters are affected by your actions and conversational abilities. Be the good "son" and you'll be on easy street but behave badly and face the whip. Sort of.