What is Sgt. frog?

Answer 1

Sgt. Frog, or Keroro Gunso in the original Japanese, is a humorous manga about a brother and a sister who come upon a froglike alien who was hiding inside the brother's bedroom. The brother is and occult fanatic and the sister is like the "golden child," with the perfect grades, figure, and sports ability. The mother of these two children is a manga editor, and she absolutely adores Keroro, the frog alien. It's pretty much about how that frog and its comrades try to invade Earth while their hosts, the children and mother from before, are housing them and trying to keep them from succeeding. It's also just a bunch of random, hysterical nonsense condensed into a graphic novel.

Answer 2

Sgt. Frog is a Japanese manga series written and illustrated by Mine Yoshizaki. It follows the misadventures of a group of alien frogs trying to take over the Earth, only to be thwarted by a young boy named Fuyuki and his friends. The series is known for its humor and quirky characters.