Seina Yamada is not unlike most teenagers. But Seina suffers from a terrible misfortune. He happens to have the worst luck of anyone on Earth! When he rides his bike, it falls apart. When he hurries downstairs, he ends up in a crumbled heap. However, when a space craft nearly crash lands right on top of him, Seina's luck takes a turn for the better…or does it?

With Earth a mere flicker in his transport ship's rear view mirror, Seina Yamada finds himself speeding towards the acclaimed GP Academy millions of light years from home. But the safety of a calm space flight is interrupted by the arrival of a prate armada intent on taking the peaceful vessel down! Seina knows his bad luck has plenty to do with the invasion. Things only appear to get worse as the feared Devil Princess arrives on the scene!

Seina Yamada and his fellow crewmates find themselves guests aboard Lady Seto's starship, Mikagami. Seina learns that before he can join the GP, he must convince Seto of his worthiness or be mind-wiped and sent back to Earth. Meanwhile, the beautiful pirate, Ryoko Balta, plots to bring Siena over to her side.

Seina arrives at the GP Academy where he is reunited with a long lost friend. Not everyone is happy to see him as the malicious Seiryo Tennan lashes out at the young Earthling. Seina finds himself two new companions in the form of Roommates, but Seina fears his bad luck will ruin their relationship.

Seina, Kenneth and Rajau sneak out of the dorms after curfew in the hopes of finding some action. They get more then they bargained for when Amane shows up and offers them an adventure beyond imagination. The situation turns serious when the boys discover Amane isn't herself.

Day One of training at the Galactic Academy finds Seina Yamada unable to keep up, literally! Without the benefit of a body enhancement procedure, Seina faces the possibility of failing P.E. However, his instructor hopes to see to it that failure is Seina's only option. Yamada also faces a difficult decision when he learns that undergoing the enhancement operation may handicap him from ever being able to set foot on Earth.

Seina returns from his body enhancement to find Amane waiting to take him back to her house for some much needed training and rehabilitation. But Amane's not the only roommate at the house. Kiriko and Erma also move in to create an interesting living situation, to say the least. Seina somehow ends up on the wrong end of an extremely angry, knife-wielding, GP director, but things work themselves out, as things do, and he's able to begin his training to get comfortable in his new body.

The second day of training begins with a serious attempt to clean up the house. But of course, distractions arise that keep Seina from doing his work. And Amane's parents drop by for a surprise visit that makes the situation even messier. Will Amane be able to stand up to her parents or will she be forced to return home with them, leave Seina, and turn over the responsibility of his training to someone else?

Having completed his first stage of body enhancement, Seina embarks on his first training mission in space. But the routine voyage goes awry when pirtaes attack! With a damaged ships, marauding pirates afoot, the alluring but deadly pirate queen Kyo Komachi aboard, and a power mad Seiryo on his heels, Seina gets some on-the-job training he never expected.

Seina Yamada turns his chronic bad luck into a powerful crime-fighting tool as he joins the peacekeeping galaxy police in a hunt for the ruthless space pirates. As he embarks on his maiden voyage, Cadet Yamada unwittingly ensnares a massive pirate ship captained by Tarant Shank, a blood-thirsty madman gunning for Seina with a vengeance.

Seinas success as a ship captain prompts the GP to give his entire crew a hefty raise! Everyone but NB, that is . . . Seina is forced to run a special errand for the deviant little bot, which requires him to visit some shady business establishments. Meanwhile, the Pirate Council has also sent one of their agents on a special errand. The mission: eliminate Seina Yamada!

Seina and his crew find themselves low on rations, low on power, and even lower on morale. The only thing they have in abundance is trouble! A horde of blood-thristy pirates is on their tail and after a mysterious box which Seina must deliver to Lady Seto, or die trying.

While awaiting repairs to their ship on Jurai, Seina and his crew get more than they bargained for. Kiriko, Amane, and Ryoko fall victim to Lady Setos matchmaking ploy, which pits them against one another and leaves Seina in the middle! Ryoko is told the truth about her heritage and discovers that family can be a royal pain, and Seina makes a mysterious, new friend.

Seina has a new ship: Kamidake II, and a new mission, Transport a mysterious girl, Neju, to GP headquarters. When he crosses paths with a pirate convoy, his state-of-the-art battleship is more than up to the challenge. There is one problem, he is forbidden to use any weapons.

Seina returns home to visit his parents and is met with a feast and festivities that lighten the spirits of the entire group. Amane and Ryoko, however, still seem to be stressed out, as they try to make a good impression on Seina's parents. But all goes well at the Yamada house, and even NB's able to ingratiate himself into the household. Are things actually looking good for Seina? What's waiting around the corner to trip him up?

Seina leaves the girls behins to help out at his parents store and heads off on his bike with Fuku to search out the elusive Washu, mother and creator of Fuku. But Seina meets up with more than Washu as he gets reaquainted with old friends like Tenchi, Ryoko, Aieka, and others. But Seina's visit is cut short by an emergency call from GP, and he's rushed away, not even getting ot eat Tenchi's wonderful cooking. What dangers loom on the horizon?

Seina and the gang encounter the infamous Good Luck fleet and emerge victorious from the first battle. But General Daluma's recruiting new soldiers to help in his cause, and searching the galaxy over for charms assured to raise his luck level above Seina's. Will the group's much deserved vacation give tem the strength they need to do battle with the Pirates once more, or will it leave them lax and unprepared?

Pirates once again threaten the galaxy as the new flagship of the Good Luck Fleet comes gunning for Seina, who gains a new, yet old nemesis in the flagship's captain. Amane gets an unwelcome visit from her father and an invitation to walk down memory lane- literally!

Seina is having a very bad day. Th women of Jurai want to marry him, Seiryo Tennan wants to destroy him, and Amane and the others have disappeared! Meanwhile, Kiriko makes a choice that will change her destiny forever.

With Kiriko bonded to the tree Mizuki, the second stage of Seto's plan gets underway. The core unit of Mizuki is merged with the Kamidake to form an even more powerful spaceship. With Seto taking command of the vessel for its first mission, the crew stumble across the top-secret base of the Da Ruma Pirates Guild.

The Da Ruma Guild may be no more, but Seiryo and his ship the Unko are still at large and causing trouble. With no easy way to track him down, Seto and Airi organise a duel between Seiryo and Seina to lure their quarry out.

With the threat of both Seiryo and Da Ruma removed the Anti-pirate Decoy Squad is disbanded, and the Galaxy Army take an interest in the Kamidake. Seina and his crew try to obstruct the transfer when they hear their ship is to be taken from them. The girls are accused of conspiring to hijack the ship when it disappears en route to its new home, and Seina winds up shipwrecked on a remote planet and facing a murderous old foe.

Tarant Shank's guild of pirates set out to capture Seina, but as he shelters from their attacks with the villagers who took him in, he discovers an ancient and powerful weapon concealed in a cave. Meanwhile, the girls work to clear Seina's name and discover that there is more to the disappearance of the Kamidake than a mere pirate attack.

As Seina returns to life at the Academy, the girls must go their separate ways. However, they soon discover that the Galaxy Police want them to remain together after Seina's graduation. Seina, meanwhile, is summoned to a meeting with the Juraian inner royalty for an amazing revelation about himself that also leads the girls to confront their true feelings for him.

Following the revelations about Seina's position and the girls' feelings for him, it is decided that he should marry all four of them (for purely political reasons, of course...)! However, there are a number of parties that want to interrupt the wedding for one reason or another. Will Seina even make it to the altar unscathed?