Introduction
This story is about, in Japan, in a high school called "Runa Reberesu High School", a girl called Junko Uchida, who is too innocent and nice in every aspect. This year, she meets a guy called Rui Kimura, who becomes her friend. One day, Junko founds an injured angel, and she helps him. While she was healing him, she discovers that the angel is Rui. They are through an adventure, and in this story includes demons and fallen angels, which in this story, their categories are separated from the demons category. Rui's mission is to protect her from evil and keep Junko be innocent, without she falling in any temptation made from a fallen angel called Ren Matsumoto, with his fellow, Yami Yamagutchi. Ren strangely falls in love with Junko, but Yami gets jealous.
Will Rui complete his mission and protect her from Ren?