Mako, raised in the rural area of Chichibu, is the eldest of three sisters—responsible and serious by nature—but secretly works in AV without her family's knowledge. She faces a shocking experience: her first creampie. Her still-developing body, retaining the simple beauty of adolescence, becomes distorted by unauthorized acts that contradict her pure heart. To match her ex-boyfriend's preferences, she keeps her pussy shaved, oozing pre-cum, and takes a large cock deep into her mouth with a dumb blowjob expression. The baldness of her body reveals lewd vaginal folds tightly gripping the dick, a sight that transcends mere eroticism and symbolizes impure desire. She receives a forceful creampie deep inside her immature womb, where semen and arousal fluids mix, emitting a nasty, arousing odor. Amid these experiences, she secretly harbors the wish to become pregnant.