Lala-chan, who continues to have her panties soiled with the slippery liquid overflowing from her crotch, is a little anxious. She's somehow embarrassed to consult with her mom, so she secretly goes to the hospital. The one who examines Lala-chan is Dr. Kagami, a perverted doctor who loves beautiful girls. Taking advantage of Lala-chan's lack of sexual knowledge, he proceeds with a very embarrassing examination... From the embarrassment of having her crotch examined, Lala-chan immediately tries to close her legs. Dr. Kagami calls in a young male doctor for help and forcefully opens Lala-chan's legs and pins them down. Lala-chan, who is seeing a naked man for the first time, is about to cry, but is confused by her hot and flushed crotch. Seeing Lala-chan's state, Dr. Kagami escalates. He pretends that a vibrator is a dilator (a device that expands obstructions such as blood vessels, vaginas, and intestines) and stimulates Lala-chan's small vaginal opening with vibration. The embarrassing examination of her genitals is repeated persistently, and Lala-chan, whose feeling of bliss reaches its limit, can no longer hold it in and has an accident... Under the guise of hospitalization for examination, Dr. Kagami is able to perform a sexual examination on Lala-chan with her parents' approval. He visits Lala-chan's hospital room with a young male doctor. Dr. Kagami proposes a curriculum to help Lala-chan, who lacks sexual knowledge, learn more about the sex between men and women. When he tells the male doctor to expose his lower body, the male doctor immediately takes off his pants and underwear. Lala-chan opens her eyes wide at the strangeness of the adult penis. "How is it, Lala-chan? You're seeing an adult man's dick for the first time, right?" Dr. Kagami instructs Lala-chan, who is nodding while glued to the dick, to slowly take off her clothes. The male doctor's penis becomes fully erect as he watches Lala-chan's shy figure removing the buttons of her pajamas. "It's amazing, isn't it? A girl's body is a field for growing the next generation... it's a place where seeds are squeezed in. The slippery stuff of Lala-chan is the lubricant for inserting this into the vagina." Dr. Kagami explains the act of sex while playing with the doctor's genitals. While showing her petting, he says, "Lala-chan, your face is turning red... try to confirm what kind of changes are happening to your genitals with your own fingers." Lala-chan, with her eyes glued to the adult act unfolding before her eyes, slips her fingers into her panties. Just by touching it a little, she reacts violently! "Lala-chan, try touching it too? It's twitching, but it's not scary, okay?" Lala-chan, hesitantly but full of curiosity, reaches out with her eyes glistening. "Good job, Lala-chan. Men, if you lick this with your tongue, they'll be even happier. Try it." He instructs her in fellatio. Lala-chan, although scared, tries her best with her lovely lips. The male doctor, who is immersed in the secret act of adults, can no longer stand the increasing movements of Lala-chan's lips and ejaculates in her mouth. "It's bitter..." Lala-chan distorts her expression. "Actually, it's prohibited to actually insert it from a hospital compliance perspective, but it's okay just to touch it, so ○○-kun, try pressing your glans against Lala-chan's vaginal opening... Lala-chan is okay too?" Because Lala-chan has a strong urge to be thrust into her, even though she has a young body, she nods her head. She vigorously rubs the thick penis against her lovely labia, simulating sex training. In the end, she is ejaculated on in front of her eyes. Next, she gets help from an inpatient with sensitive nipples. By making the man feel active with nipple play, Lala-chan deepens her understanding of the man's sexual response. It turns out that the reason for Lala-chan's aversion to sex is that the sexual prank she received in her childhood has become a trauma, as revealed by counseling with the inpatient with sensitive nipples, who is also an authority in psychiatry. With his advice, they decided to carry out a "re-education program" to overwrite the wound in her heart by letting Lala-chan experience her childhood in a simulated way. They set up a pseudo-nursery in a corner of the ward, and Dr. Kagami becomes the caregiver and the actor doctor becomes the older brother, and they begin role-playing so that Lala-chan can return to her childhood. While drawing pictures and playing with origami, she wets her pants in her pajamas... She takes care of Lala-chan's wet panties and puts on a paper diaper for her. Lala-chan, embarrassed that only she has a diaper, asks her older brother to wear a diaper too. With the help of Dr. Kagami, she puts a paper diaper on her older brother. But the older brother, who loves Lala-chan, his dick gets bigger while he's being taken care of. It looks painful because it's hard. As she had learned during her hospitalization, Lala-chan plays with it with her fingers and tongue, making the white liquid come out. In fact, while taking care of her older brother, Lala-chan also secretly wets her paper diaper with pee...