Nana Suzuki was just a normal girl with a not-so-normal inventor for a grandfather, until one day she tinkered with the wrong invention and found herself... surrounded by six other Nanas?! Each copy reflects one aspect of Nana's personality, can wield superpowers, and feels she has every right to keep her memories and her life. Now, with seven girls all vying for the same desk at school, the same clothes to wear and the same crush to fall in love with, only one question remains: who will become the real Nana?
As the mighty star fleet of the planet Keron prepare their invasion of Earth, Sergeant Keroro and his elite team of commandos have been sent to infiltrate the enemy strongholds and gather as much intelligence as possible. However, it seems even his extensive military training is no match for the forces of Earth, as he is discovered and captured by the two middle school siblings, Fuyuki and Natsumi. Submitted to the rigorous torture of housework duty, the amphibious Keroro must now bide his time, covertly locate his squad-mates, and resume his mission of conquest!
I believe that if you liked either Nana or Sergeant Frog, you have a chance of liking its partner! Why, you might ask? Both series are comedy-based and are about a group of individuals who must remain hidden in the recesses of someone's house, causing chaos to the people around them as they hide. Both have more flying and wacky encounters than you can count, as well as a bit more into the extensions of sci-fi and superpowers!
What made me recommend these is that Mutsumi 623's radio station broadcasts to both Nana, and the Sergeant's worlds! I wonder if they will collide someday? Probably not, but it's fun to imagine!