Shichinin no Nana

Wacky teens' adventures, random comedy, sci-fi, love and identity problems; one is all about aliens and action, while the other has more prominent school and romance themes, but still, some fool(s) always makes a mess out of the main character's house and life. Sharing the same artist and vibes, it's likely to spot - and enjoy - many similarities. Keroro Gunso's Momoka has a split personality? Nana has one for each day of the week. Another character, Saburo, even cross-overs between the shows. 

In both animes theres sisters/copys who pretty much look alike, each one with a different personality. 

Both these titles are about the multiplying power of the microwave oven. In one series, the microwave is used to create multiple timelines. In the other series, the microwave is used to create multiple Nanas. I recommend these series to microwave fans, and all others. 

While they have their differences, for example, Osomatsu-San is aimed at a more mature audience, (If you're looking for something a little more risque, read the Shichinin no Nana manga. (o_o)) and Shichinin no Nana is somewhat is aiming for a consistant story in the end. They both have the theme of "multiple of the same face living under a roof." (except Shichinin no Nana has one 1 more). All have their own personalities, and they conflict with each other almost every episode. It's also worth noting that each Nana and Matsuno has a unique color to help them stand out. Nanacchi and Jyushimatsu, for example, are both yellow because they are hyperactive and always happy.  read more