She was cheating on him with a friend. Mary, the novelist living next door to her, approached Hajime as he was devastated. Following Mary's words of consolation, the two had sex. Over the three days until she returned from her affair trip, their distance rapidly closed. Lover-like conversations. Lover-like sex. Yet, their worlds were separated by a door. With one different choice, another life might have been possible. As many options as there are, countless versions of her exist─Parallel Worlds (Multiverse) × Mary Kitsune, finally begins.
