An innocent 18-year-old virgin loses her virginity at a hot spring with a man for two days and one night without her parents knowing! A minor who has never traveled before observes a penis in the car. She secretly has her first kiss outdoors, and when she exposes her beautiful breasts and licks her nipples, her panties get soaked with the pleasure she has never felt before. As soon as she arrives at the hotel, she goes into a mixed-gender open-air hot spring, has him suck her penis, and when she plays with her clit, a large amount of pussy juice drips out. An extra-thick penis is inserted into the virgin's vagina, which no one has ever touched, and she loses her virginity in sex! Confusion, embarrassment, pain, pleasure, bloodshed... A hot spring diary of a young girl turning into an adult woman.