In the visual novel, the main protagonist is Chris, whom the player controls. Chris is a slacker who roams from town to town until he comes across the unnamed town that is the setting of Popotan. The story centers around him as he moves in with three sisters and their maid (all of whom become the protagonists for the anime) and his transformation in his lifestyle. In the anime, the primary protagonists of the series are the three sisters, Ai, Mai and Mii. Ai is a compassionate, motherly figure whose overly compassionate nature often causes problems. Mai is a tomboy who wishes for the quest to end and to live a normal life. Mii is an energetic child who likes to cosplay and help people in trouble. Early on, the series explored the characters' personalities by focusing on a single character