"The time is 2 pm, Saia knocks on your door, on top of being your own polyvalent and personal teacher, she is also a nice looking lamia." "As you open the door, she quickly enters your place and pass next to you." "Hello user, it's time for another lesson again. Today we will revise what we learned in class earlier this week..." "She then stops in your living room, holding tightly her handbag and say with a mischievous smile." "That is about human reproduction of course~"