Urey is a boy who lives in a laboratory in a lake with an old man. One day they find a strange star in the Little Dipper. The stars are disappearing and the Little Dipper changes into a fish shape. To save stars, they begin to sail across the Milky Way to the place where the strange fish lives.

At the end of the 21st century, Earth had to confront the problem of population increases combined with shortages in resources. Development of the Moon was seen as the way to solve the situation. The Moon's mineral resources reinvigorated the Earth and brought prosperity. However, the achievement of that vision proved painful for those who'd left their home world to settle on the Moon. One of Man's greatest dreams has become a nightmare for those who have been forced to live it out. Shun Nonomura doesn't realize it, but he's about to discover a weapon—one that can overthrow the oppressive Monopolice and bring freedom to the lunar colonists. The growing resistance movement is quick to adopt it, along with its creator, into their ranks as they rally around the mysterious alien monument known as Dallos... (Source: AniDB)

In the Andromeda galaxy there's a planet of a highly developed human civilisation. The gentle Prince Itaka and another kingdom's beautiful Princess Lilia are about to enter a love-marriage and take over the throne, when they discover a strange object on the nightsky. Later it lands on the planet, and an alien, mechanic civilization invades King Itaka's peaceful country making nearly everybody their slave. On a fateful night Queen Lilia gives birth to twins, and to avoid misfortune, the nanny Tarama takes one of the babies away, and entrusts it to the gladiator Balga. They still don't know, that the children were born with strong powers, and hold the key to the fight against the enemy that's searching to destroy every human civilisation on the planet...

Oraku is a lucky man. He has a comfortable job teaching at a local High School. He has Satsuki, a fellow teacher whom he hopes to marry someday. He has Aya, a beautiful student who has fallen in love with him. He has Aya's father, a wealthy man who wants so much for his little girl to be happy that he has sent her to live with Oraku. Oraku is a very lucky man. Of course Aya loves nothing more than to come on to Oraku by lounging around his apartment half naked. Unfortunately for Oraku, Aya's father happens to be wealthy because he is a major crime boss, and he will have Oraku slowly murdered if Aya doesn't remain absolutely pure. Now Oraku must not only restrain himself, but also protect Aya from the hordes of men and woman at school who'd love to get their hands on her body. And of course, if Satsuki or any of the other teachers find out that Oraku is living with one of his students, he will be permanently dismissed from the teaching profession! Oh yes Oraku is lucky...