Chikyuu Shinryaku! Colreonis

Alford Basiliskos, of the galactic Basiliskos Empire, has been sent by his father to conquer the earth with a giant robot. To his father's disappointment, Alford is more interested in passing his days eating doughnuts from the cute, kind Hoshigawa Yumi at her doughnut shop. Will Alford be able to find his motivation to conquer the earth? And will he ever find a way to get closer to Hoshigawa?