One day, Nao, who worked as the secretary for Shota's father, came to the house of the single-parent family. With the father away on a business trip, Nao was in charge of taking care of Shota. Known as a serious and beautiful secretary, her strict personality made her somewhat intimidating to Shota. However, having grown up without a mother, Shota had developed a strong curiosity toward women's breasts. Though Nao tried to maintain her usual professional demeanor around him, she gradually found herself drawn into Shota's world. His actions turned out to be far bolder than she expected, slowly breaking down her disciplined facade. As Shota fondled her big tits and played with his cock, his naughty pranks grew increasingly intense, pushing Nao into full arousal. Their strange cohabitation soon evolved into a hotter and more intimate relationship.