Arisou de NASA-sou(2014)

Arisou de NASA-sou

Alice and Elle are Americans who grew up on their own in a forgotten NASA moon base. Unfortunately, they don't understand how human society works, so even after they returned to Earth, they still act weird! They continue to unknowingly invade Tsukishima, Tokyo, the downtown area where they live...!

(Source: Kodansha, translated)