Mie happened to pick up medicine that an old man dropped. When he took it, he turned invisible. With this (dis-)appearance of his, he starts to molest women in a public bathhouse, an all-girls high school and does not stop in the apartment of his female co-worker.
Until it backfires at him…

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.

For three years Akira has been saving up for a computer. When a model 9821 goes on sale he runs to the store only to find it sold out in five minutes. Discouraged, walking home he discovers a man in an alley who happens to have the computer he was looking for. Excited he buys the computer and runs home only to find that he did not purchase a 9821 but a 2198, a super-advanced bio-mechanical computer girl named Mimi.

Once again, the peaceful morning is shattered by a diatribe delivered by a sister to her brother. This is a daily occurrence at the Utsumi household, and the fact that his relationship with his step-sister, Miyu, isn’t improving is a cause of anguish for Mitsuru. While she may behave like an angel in the presence of their parents, when they are alone, she’s a pure devil.
One day, Mitsuru discovers that Miyu has a complex regarding her bust-size. He unwisely brings it up and she blows up at him. While attempting to restrain the raging Miyu, the two lose their balance and fall. Staring into Miyu’s face up close, Mitsuru finds himself drawn by her cute features, the warmth of her body, the peculiar scent of a young girl…

The second volume focuses on Mirei Masaki, who sees both Mitsu and Orijo as rivals.
Mitsuru and Mirei become intimate during their meeting in the library.
However, by chance, the secret cross-dressing is exposed.
Mirei invites Mitsu to a date on the condition that he does not reveal it, and the two gradually develop a good relationship with a sense of distance.

Based on the manga by Seto Yuuki.
Waitress Tamaki has sex with her playmate Kurono at the café she works for. Ignorant of their relationship, their common friend, Ohashi, visits the café as usual to see Tamaki whom he secretly loves. However, Kurono notices Ohashi’s feelings. In order to incite him into confessing his feelings to her, Kurono molests Tamaki and makes her wait on him as she is. As she was sexually excited, she gives off a female’s scent, which, in turn, excites Ohashi. Meanwhile, Tomoe, a friend of Kurono’s appears… Will Ohashi be able to confess his love to Tamaki?

Wataru is a young man who moves into an apartment next to Tomoka and Fumie Fusono, two voluptuous sisters who used to know him when he was a shy child. Now Wataru is all grown up, and the Fusono sisters are ready to take full advantage of that fact.

A pretty college student has a little adventure before graduation that turns out to be one big problem. Her starring role in an adult video lands her plenty of admirers, ready to blackmail her for pleasure.