A new teacher, Ms. Yuki, with loose perms, a baby face and a raccoon face. Her droopy eyes make her very popular with men. Today, she is teaching sex education at our boys' school. "Do I have to do this too...?" It's a tradition at our school that all new teachers have to do it. She timidly begins to measure the students' bodies and erections. Hey! Who told you to jerk off until you ejaculate? The doctor will also measure your three sizes. He will measure the diameter of your vagina. "No, don't look..." Do you always have this much secretion? Don't hide it. It's a study. Yes. Next is the practical exercise of sex selection. "Eh? Is it sex? That's..." What? Are you abandoning your students? So why does so much juice come out from the nipples and fingering? "I've never had it happen before..." You're kidding (lol) How did you feel when this happened? Does it feel a little good? Not a bit! Please apologize. Did you lie again? After the punishment deep throat, it's time for deep penetration from behind! For girls, it's 2-3 days before ovulation. For boys, it's time to thrust deep inside and cum inside! "He's thrusting deep inside," "The man's organ is deep inside the woman's organ," "It's close to the cervix," "It feels strange. I'm sorry everyone..." Sorry? I'm sorry about that! I don't understand if it's a strange feeling. I can't write that on my test! "I'm about to cum. It's an orgasm..." The students enjoy the warm vagina in a spanking cowgirl position. They cum over and over with a troubled look on their faces! But I have to explain it to my students properly. Every time I do it, I get wet and have an orgasm! It seems that Yuki-sensei has some perverted tendencies! "I want a boy..." Yuki-sensei says, so I thrust hard into her and cum inside her.