A secret private lesson unfolds between a certain club advisor and Aoi. After practice ends, the teacher calls Aoi into the sports field restroom under the pretext of checking her progress, thoroughly examining her petite body. Later, when Aoi injures her leg, the teacher gently lifts her up and takes advantage of the situation to invite her to a love hotel. Aoi, who has always been curious about erotic experiences, gradually finds her heart drawn to the teacher's warmth and kindness. Their relationship deepens, giving rise to new emotions...