At 149cm, Chisato, a high school student, lives her days as a serious and responsible class president. However, she hides an unexpected side. In a quiet hotel room, she indulges in her concealed eroticism. Engaging in compensated dating, Chisato continues to suck the man's cock with delicate yet terrifyingly skilled technique, despite feeling disgusted by his presence. Her appearance contrasts sharply with her mature, alluring demeanor, captivating everyone who sees her. It is precisely this duality within Chisato that makes her most compelling feature.