Synopsis: Sundome!! Milky Way

While driving one night, Yoshitake, a typical corporate worker, came across a UFO and had a collision with his vehicle. When he woke up, Yoshitake discovered that he was in his apartment, accompanied by a remarkably attractive extraterrestrial named Lune! Lune's mission is to save her species from extinction by collecting human sperm, and Yoshitake's insatiable sexual desires make him the perfect mate. Nevertheless, Lune's unusual alien biology poses an unexpected challenge that may be too difficult, even for the most sexually active man.