Valkyrie is a member of the Intergalactic Royal Family of Valhalla. She is elegant, beautiful and a really bad driver. She crashes her spaceship right through the roof of the Tokino bathhouse and onto the head of it's owner, Kazuto. To save his life, Valkyrie gives up half of her very soul. Oddly enough, it works! Katzuto is resurrected! But, there's one small side effect: Valkyrie. She has transformed into half her age. She's cute, cuddly and nutty as a pit bull. (And then things start to get weird.) Valkyrie and Kazuto fall in love. Housekeeping cat girl Ms. Sanada is sent to protect Vakyrie. Hydra the warrior princess has some size issues. Princess Laine has some shopping issues. Earthly sweetheart Akina has some emotional issues. And, Valkryie's dog Spot has some issue issues. So grab a towel and take a dip into the silly, sexy space romp, UFO Ultramaiden. It's time to answer the age old question of the universe; does size matter?