Mineta Chisato's mother dies of an illness and her father, who is saddled with a debt of 1 million yen, also disappears. In a bid to flee from the debt collectors, she ends up staying in internet cafes while on the run. Then she meets the president of an established toy manufacturer who offers to assume the debt on condition that she marries him and she begins living together with six eccentric but handsome step-sons.