"Hareru Michi ~Omera ni Awaseru Kao ga Nee!~" (晴れる道 〜宇宙人(オメェら)に合わせる顔がねぇ!〜, Sunny Path ~I Don't See Any Aliens!~) by Jicho Kacho is used as Opening from episode 104 to 129.

"Shōri no Hanabira" (勝利の花びら, Flower Petals of Victory) by Chinatouchable (Chinatsu Wakatsuki & Untouchable) is used as Ending from episode 104 to 116.

Fuyuki's dream of Keroro successfully invading seems to come true as the platoon begin to act with uncharacteristic determination.

Fuyuki opens a closet, and falls into a hole along with Natsumi, leading to a secret city called "Alien street".

When Kururu mentions that he's now ready to "Drink, hit, and buy", Tamama explores the adult part of Alien Street to find the meaning of it.

In the end, it seems that while he was asleep, the "If you can live life over again gun" fell out of a closet and fired at Tamama, making him an adult.

Keroro perfects his shoulder massaging technique in order to gain Aki's appreciation and pay.

Giroro trains the platoon in the mountains, while Natsumi and Koyuki enjoy a school trip to the lake.

A bored Keroro goes around looking for DVDs to watch, but there's nothing his friends have that he likes, until he spots a DVD on Kururu's desk with warning signs on it.

While visiting Grandma Hinata's house, the platoon find an alien that can shapeshift into anyone's worst fears.

The platoon once again let their copy robots take care of the house while they plan for fun activities, but things once again spiral out of hand.