Makoto and Yura Onoda are a newly-wed couple with zero sexual experience. Yura is a shy and naive 25-year-old woman whose good looks grab men's attention, something that she dislikes because she gets embarrassed very easily. Her husband Makoto is of the same age, but as opposed to his wife, he loves having dirty thoughts about other women. Physically though, Makoto is truly faithful to Yura. Both of them may be virgins, but now that they are married, they are ready to dive into the world of sex, "practicing" as often as possible. However, the world of sex is complex, so they need all the help they can get to find their way through it. Thankfully, their friends, acquaintances, and porn media lend them a helping hand.

The year is 2291, and the citizens live a peaceful existence after the catastrophic war between the humans and the Yuman. This quiet life is about to be shattered, the leader of the Yuman is not convinced the war is over, and now plans to renew hostilities!

The year is 2755. As a result of a system malfunction, the cargo ship XeBeC goes off-course in a warp gate and ends up within the orbit of the distant planet Garaga. After crashing on Garaga's surface, the crew must find ways to survive from hideous monsters, rabid ape soldiers, and a race of mysterious psychics.

In the near future when technology has significantly advanced, a famous AI TV fortune teller seemingly foresees high school student Asahi Kashiwagi's day with pinpoint accuracy. On his way to school, he encounters Aoi Izumisawa, Bai Mongfa, Karin Istel, Amelia Irving, and Ilya Ilyukhin. Despite meeting them for the first time, Asahi suddenly receives love confessions from all of them at the end of the same day, perfectly aligning with the fortune teller's prediction. As if that was not enough, Asahi soon learns that these five individuals are actually candidates to become his bride, and they have been invited by his father to live at Asahi's home. Left with no other choice, he reluctantly allows them to stay, resulting in a bawdy turn of events that brightens up his average high school life. However, as Asahi spends more time with them, forgotten memories gradually resurface. While uncovering the hidden truth, Asahi begins to believe that his fate with these potential partners might be more than just mere coincidence.