Sumomo flees her constraining life as a Space Idol by going to Pekopon where no one recognizes her. However, she realizes that she does enjoy being a celebrity and performing for all her fans.
Giroro, the most dangerous man in the universe, has his belt taken. Without it, he is useless as he can't even keep his balance. Neko saves the day when she finds the belt and prevents Giroro from leaving Pekopon and Natsumi. The belt was revealed to contain a picture of Natsumi.
Llega a Pokopen Sumomo, una ídolo conocida en todo el universo... menos en la Tierra.
Giroro pierde su cinturón y entonces, pierde su puntería. El resto de la tropa le dice que se ponga un cinturón que inventó Kururu pero él se niega.
全宇宙最紅的偶像Sumomo，居然出現在日向家，Keroro等人非常興奮，忙著準備Sumomo的地球演唱會，但是Sumomo卻一副心事重重的樣子…
Giroro用來維持平衡的背帶突然不見了，怎麼找都找不到的Giroro，為了避免拖累戰友，於是自請退伍，此時小貓叼來一只Kururu的袋子，裡面竟是Giroro的背帶…
