The theme song is changed between two different ones as the series progresses they are good songs but they aren't anything really spectacular. It's used well to show the impulsiveness of the two twins Ako and Riko but to also Keita and how bewildered he becomes when exposed to any suggestive behaviour In Kissxsis it knows where to draw the line and to deliver it well. The animation of a comedy is in my opinion key to creating a funny anime by simply how far in eccentricity it will go without making you question your sanity. What gives the story a bonus is the fact that it's pretty original and probably not been attempted before. See what's wrong? It's pretty stupid, but was it really supposed to be taken seriously? Bear in mind this is a comedy and this is not the main focus. But should keita indulge in his desires for his new stepsisters? The two girls (Ako Suminoe and Riko Suminoe) are far from reserved when it comes to their feelings especially when compared to Keita himself. Much to their surprise their families married each other and these two girls became Keita's sisters. Keita Suminoe is an average high school student that grew up with two girls that he shared affection for due to his child like innocence. My friend reassured me that this anime was superb and she wasn't kidding. This is what actually kept me away from the anime Kissxsis in the first place. It's not an easy challenge to pull off incest as a form of comedy styling.
