Ichirou Kuga is a struggling manga artist who must balance his professional life with taking care of his two young siblings – no easy task when reliable assistants are so hard to come by. With looming deadlines threatening to overwhelm him, Kuga is thrilled when a beautiful young woman named Shiori Goshiki applies for the assistant position and turns out to be extremely talented. However, there’s far more to Goshiki than meets the eye, and Kuga’s life is transformed when he discovers that she’s no human but an alien princess… to whom he’s apparently just become engaged.