The series has exceeded a total sales of 210,000 copies! Finally, finally, it's been made into a live-action film! Childhood friends 'Hiroki' and 'Meiko' who live next door to each other. They are so close that they can freely come and go to each other's rooms since they were young. Even now that they have entered adolescence, that relationship has not changed. 'Meiko', who is not very interested in love or sex, notices the gaze of 'Hiroki', who is horny and in the throes of puberty, as she is lounging around in unaware loungewear that emphasizes her cleavage. "If you're so interested, why don't you touch me?" If a mere childhood friend tries something erotic out of curiosity... The brakes stop working. It was supposed to be just letting him touch her breasts, but it turned into masturbation, fellatio, and then SEX. They can no longer go back to being ordinary childhood friends like before. Most of the boys in the class are virgins. Hiroki feels a sense of superiority for having sex with Meiko, whom everyone admires. They skipped class and had sex many times in secret, such as in the gymnasium storage room, on the stairs near the rooftop, and in the toilet. Meiko, who has become more like a woman after experiencing sex, is now looked at with erotic eyes by the boys in her class. Hiroki became jealous... as if to say that Meiko is mine. Frustrated, he takes Meiko to the toilet, but... there's no condom. It's okay without a condom, right? Hiroki inserts himself forcefully without even confirming with Meiko. And then, he cummed inside her because it felt so good. Hiroki, who is excited all by himself. Meiko leaves crying. What will happen to the relationship between the two after this...