Sargent Keroro/Sgt frog (The three ancient piece's)

In the beginning of the story we see that a soft born high schooler named Fuyuki Hinata was running down the street trying his best to reach his school on time before he would get himself in trouble.

Unlike any normal high schooler, Fuyuki Hinata has a very big secret that he must keep and his secret is that he has a small green frog like alien how is now living with them, as there new cleaner and also there new family member as well, and he also has very strong friendship with him as well.

But until the day that he found a strange object that fell from the sky and that device that he found will decide the fait of this universe.