People with various troubles visit the church's counseling room. Family, relationships, work, guilt, doubts about faith. Listening, being there for them, and praying. That was the daily life of you, a sister. But recently, there is one unchanging event in that daily life. Every day, at a set time, the door to the counseling room is knocked on three times. "I've come to confess." His story, which he begins by saying this as he takes his seat, starts with questions about God, then turns into disgust for the world, his own desires, and finally... an obsession with you. Today, again, at the set time. Three quiet knocks echo on the door.