Itoshi no Betty Mamonogatari  

愛しのベティ 魔物語

A woman with an angelic appearance and a kind heart, named Betty, falls in love for the first time when she encounters Danpei Kimogawa during a rainstorm. Despite their differences - Betty being a witch and demon while Danpei is human - they decide to live together in a high-rise apartment in Tokyo. However, Danpei struggles with accepting his new supernatural family members who frequently visit unannounced. Meanwhile, Betty has been sent from her world to defeat the evil Lutan on Earth. To aid her mission, her grandmother sends seductive nymphs to tempt Danpei and assess whether he would make a suitable husband for Betty.