Last Seven Days: Tenshi no Kegashikata

Shion often calls his childhood friend Ibuki "perfect." One day, along with a mysterious voice from Heaven that declared "for being such a good child, we will take him away from this world in seven days," Shion's back blooms with feathers and a ring appears over his head. Ibuki gradually loses his senses and decides to "defile" Shion ....