Daisuke attends Touka Gakuen in Miou-jima, a small town which is an 1-hour ferry ride from Tokyo. He is great at housework and studying, but because of his scary looks, people mistakingly think he is the worst deliquent. He works as the caretaker of the Yashima-sou school dorms where his two older sisters Otome and Megumi live. They know he is an earnest and kind person. One day, he receives notice from the school that Yashima-sou will be torn down.
Yuya lives with his father and mother. He enjoys his life with Kazuki, his close friend. But one day, Yuya sees his mother, Mizuho, and Kazuki having sex.... Days later, Chihiro, Mizuho's younger sister, visits his house. His evil desire arises and puts some medicine into a coffee he has just served to her...
Protagonist Yosuke Ikeda was reminded of his own shortcomings in the daily presence of cool-headed, talented, universally popular lady Saya Mikogami. She saw him being humiliated for his lewd tendencies and decided to fix him up by taking a private holiday to an uninhabited island. At the same time as they trained Yosuke and Saya became lovers, as she showed him the ways of sexual discipline... a splendid baby-making life with the cool, perfect older girl!
Yukino has a daughter, Emi. One day, Emi brings her boyfriend to her house. But they have a quarrel and she leaves the house.... Yukino enters Emi's room and says to him, "Well, I'll teach you how to have sex...."
Main character Yoshizawa Atsushi has a strong fetish for pantyhose. He instantly fell in love with student council president Ninomiya Ais black tights, and joined the council so he could be closer to her. One day, he sneaks into the presidents office and successfuly finds her weakness. He blackmails her and starts to train her into his sex slave...
