To support the family, the older sister works delivering newspapers. Overwhelmed by exhaustion, she nearly falls asleep during dinner, her mouth slightly open. The younger brother can't take his eyes off her, becoming aroused and impulsively inserting his cock. Pretending not to notice, their relationship gradually deepens. Slowly, the sister begins to reciprocate his feelings, eventually accepting his cock. Despite the taboo theme of incest, this story captures the shifting emotions and physical intimacy between them, delivering a tense, compelling narrative filled with hesitation and desire.