An newly orphaned child enters a dormitory filled with amiable women and in the process, gains five new mothers and doting teachers. The routine of life revolves around the dynamics of interaction between you and your new caretakers who work in different careers and wield specific skills which they can teach you. 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 with the others. Be bad and face the whip, or maybe if you're lucky, just a rebuke.