Momoko is having major money trouble. After the untimely death of her parents, she finds herself strapped for cash to pay for her college tuition. Desperate, Momoko even considers selling her most precious possession - her mother's ring... But everything changes when Takaaki, a charming young man in her class, generously offers to pay her tuition if she simply agrees to work off her debt by serving as his own, personal, live-in maid. At least, the offer sounded generous at first...