[Edogawa Shundei] Pantsu Wasuremashita (Koneko Tengoku) [Hikaru Scans]

The girl, startled by a sudden splash, opens a locker and later meets a boy in a grassy field. She consents to an intimate anal encounter, feeling the slip and squeeze as the boy's penis enters her, realizing the fluid is sperm used to make babies. They discuss practicing for the real thing and the possibility of a baby, leaving the scene charged with youthful desire and uncertainty.