A group of female students on a school trip suddenly barge into a mixed-gender open-air hot spring. Recent teenage girls are well-developed, with large breasts that make men unsure where to look. It's not just their bodies that develop early; their interest in sex is wide open. They stare at the penis and stroke it with their hands. Once erect, they get excited and demand caresses. They also feel good, leading to sex with female students in the open-air hot spring. Desires escalate into group erotic acts. Young and energetic female students have such intense sexual desires that no number of penises can satisfy them！！
