Yuuki, a teenage boy who lived with his mother, Hitomi, went on with life peacefully; however, his quiet days took an end when Yuuki's aunt, Kanna, a woman much younger than Yuuki's mother moved in to live with them. Because of Kanna's provocative acts, Yuuki's life became unbearable.

"Just be honest with yourself."

Thoughts rampaged through Yuuki's head when his aunt whispered those words to him. Should he give in or should he fight it are questions that surfaced in his mind.

Yuuki finally decided his answer and that answer led him to a door. It was the door to adulthood.