Toritsuki ~Kanojo ga Akuma de Akuma ga Kanojo~

In 'Toritsuki ~She's a Demon and a Demon's Her~', Yasuharu's childhood friend Kusuha gets possessed by a devil. He visits her home and meets Ril, a mysterious girl claiming to have been summoned by Kusuha. Refusing to leave, Ril forces Yasuharu to learn an exorcism ritual from a manual that takes seven days to master. Can he save Kusuha in time? This nukige ADV visual novel by RED-ZONE combines childhood friend drama, demon possession, and adult themes.