Yumeru Kotoishi is a young girl who has recently become curious about sex. Reuniting after a long time with the older man she's always adored, her feelings grow too strong to control, and she decides to offer him her first time. Overcome with emotion, she whispers sweetly, "I want you to teach me about sex, Onii-san..." Her innocent confession excites him further. Her pure affection and nervous anticipation of this first intimate experience deepen their bond. POV, beautiful girl, small breasts, aggressive girl, creampie.