After a memorial ceremony for his ancestors Kio Kakazu wakes up to find out that the strange girl he met at the ceremony is now in his bed! To make things more confusing the girl Eris is actually a cat girl from another planet. While Eris may be on a peaceful mission to his planet there are a ton of other organizations who want her for themselves. Caught up in the middle of the confusion Kio is determined to do everything possible to protect her even if it means his home getting turned upside down.