GAJK-013 A high school girl bound and trained in a warehouse, a perverted uncle lusts after the image of his desired woman and threatens her, continuing to train her in a dark, damp secret room. The poor country girl Mitsuki Nagisa.

Mitsuki, who lives in a rural town, has made it a habit to work part-time at her uncle's inn during summer vacation. Today, after finishing the cleaning, she took a breather in the bath. However, her uncle was peeking at her with a lecherous gaze. "You're starting to look more like your mother," he reminisced about her mother, whom he had once harbored feelings for. The next day, her uncle summoned Mitsuki under the pretext of cleaning the storeroom and bound her in the darkness, giving in to his desires. The summer vacation of torture began...