Makeruna!! Aku no Gundan!

Don decides to form his own invasion force after seeing an ad, recruiting Pepu and Chiku as his unreliable henchmen. The three of them set their sights on Earth, a supposedly easy target according to the invasion manual, but convincing the human population of over seven billion to accept their rule proves impossible. After a failed attempt to dominate Earth, Don and his squadron must focus on more pressing concerns, like finding food and paying rent, putting their plans for galactic domination on hold.