This work can be said to focus heavily on Yumi Shion's facial expressions, with numerous close-up shots that showcase excellent taste. The forbidden story of siblings elevating the excitement of childhood 'doctor play' into 'soap play' made my heart race. The younger sister Shion opens a makeshift soap land at home for her real brother, and the soap play unfolding late at night on mats, beds, and in the bathroom is the pinnacle of eroticism. The interactions with the brother, played by Nanao Shin, blend sibling love and a sense of taboo in every scenario, drawing me into the plot of unlimited release courses until morning. Yumi Shion's expressions are particularly rich, and the way her face and breasts droop in the missionary position reminded me so much of an ex-girlfriend that the immersion was intense, leaving me personally unable to contain my excitement. Combined with her darker skin tone and larger breasts as superior traits, it evoked real emotions like regret over the breakup. I highly anticipate future works set in schools with time-stop themes or health checkup situations, and I look forward to more productions that leverage this facial focus.