Reuniting with old friends at a class reunion, Hinami got carried away as the night progressed. She managed to stay conscious through the second round of drinks, but before she knew it, she had missed the last train and her friends had vanished. Collapsing on the street, she caught the attention of a man who couldn't ignore a drunk woman left helpless. Taking pity on her, he brought her back to his place. That night's events would bring a dramatic change to her life.