Demon Prince Enma

One day, a man named Heinrich, a professor of German history at a university, visits the Agency as their client. He's a German married to a Japanese woman. Lola, their daughter, has been missing. His request is to have his only daughter found. At that time, horrific incidents occurred, one after another surrounding Lola. Those who got involved with her were murdered one by one by the unknown "thing..."

Appearances of demons decrease day by day and Enma and others enjoy rather peaceful days. Kapaeru has a mail-friend named "Sat-chan." Being a young little girl, she has a sort of adoration towards Kapaeru. He gives her advice, and she calls him "Kapa-chan." One day, Kaperu receives an E-mail from Sat-chan, saying "I want to meet you." However, Kapaeru worries that his monstrous appearance would disappoint her and asks Enma to see her pretending to be her "Kapa-chan." Her problem is a serious one: It seems she has been abused by her parents. Later, after receiving an E-mail from Sat-chan asking him for help, Enma and Kapaeru rush to the site. Meanwhile, an abnormal incident happens to Yukihime.

A high school teacher Yoshinaga, college students Ayu Ayukawa and Hiroko Hoin, a free-lance writer Yuri Benten, and an inspector Naojiro Abashiri... Led by a woman in a white kimono, they were suddenly trapped in a mysterious mansion with no windows or exits. The doors which were there moments ago are now gone, and rooms suddenly appear where a dead-end was supposed to be. The layout of the mansion changes as if it's alive, putting those confined in it into a state of terror. And as if the building is picking on the guests in fear, it makes them vanish one by one. The mansion is in fact the demon itself that devours human trauma_the darkness of human hearts. Disappearance of Yukihime and the death of Kapaeru... Falling into the biggest crisis, Enma opens fire against the most vicious demon ever encountered!