⁣The four members of the lacrosse club who rushed to Mr. Kuroda's house learned that not only themselves but all of them had their virginity stolen by Mr. Kuroda...

⁣After ten years of dormancy, Linear awakes from a capsule in the countryside of Japan. Without any memories, she wanders into a small research center staffed by three beautiful women. One of the researchers, Sayaka, is entranced by the strange woman and leaves her present lover. Sayaka takes Linear to bed, and finds that her abilities are beyond that of any ordinary woman!

⁣When her family is overthrown in a coup d'état, Princess Mayuka is sent to Earth to recharge the Ultimate Weapon. After studying the mating behaviors of Earthlings, she decides to enlist the help of one of her research subjects, college student Yoshizumi, but crash-lands on his roof. Taken hostage and shot with her own gun by Yoshizumi, she is brainwashed into thinking she is his younger sister. Fortunately, Yoshizumi grows fond of Mayuka and decides to help her with her mission: to awaken the powers of Akiho--the red-haired, green-eyed, appetite-driven Ultimate Weapon--using "primitive stimulation".

⁣Musashi had come back to his village again. He had lost his memory about the four princesses who had been his childhood friends, and also forgot that he had sexual intercourse with them. Though he lost his memory, the village and his grand mother's house made him regain familiarity. He was welcomed at his grandmother's home, and met a girl named Tamamo. She said she was his childhood friend, but he couldn't recall her at all. At night, he was lured by a strange smell, and did things with Tamamo. However it was the beginning of the plot of a person who wanted to get revenge on the village leader using Musashi.

⁣Yui & Aoi Chapter: One night, the protaganist's sister-in-law, Hamada Yui, returns home bringing along her friend Fukunaga Aoi. The two are drunk and create such a fuss that the protaganist is unable to study. He goes to complain to them, but they have other plans...

⁣The main character, Tanaka Hajime, uses his hypnosis abilities to hypnotize his classmates. Due to a law passed by the government, instructions given by sex instructors are absolute. Additionally, couples have to receive instruction from the instructors before having sex or even kissing.
The next target is the captain of the Kendo club, and the goal is to teach her about getting knocked up!

⁣The main character, Tanaka Hajime, uses his hypnosis abilities to hypnotize his classmates. Due to a law passed by the government, instructions given by sex instructors are absolute. Additionally, couples have to receive instruction from the instructors before having sex or even kissing.
After a successful session he decides that he must extend the lessons by using the previous target's mother as an example...