Tenchi is lost in the wooded mountain outside Junai Academy and has violent encounters with the main characters of the series there before he is able to arrive. Ukan Kurihara introduces him to the class where he will be the student teacher. All primary characters who are high school student are conveniently members of this single class.

Momo Kawanagare, the Student Council President, gives Tenchi a tour of the school. The council's Vice President, Treasurer and Auditor Hana Saryu, Touri Fueyama, and Hachiko. The latter three strip, tie, and gag Tenchi and take out torture devices in an effort to "question" him.

In the show's first flashback, Washu explains to Tenchi that two people got caught in a dimensional warp during her experiments and she needs him to return them to their previous location for her. He is sent back in time and quickly "finds" a child Momo and they use his phone to look for her partner.

A summary of episodes 1 to 4

Tenchi escapes the student council and, while looking for a place to put his clothes back on, finds himself in the old school building and ends up being caught by the president, vice president, and bodyguard of the Science Club, Yuki Fuka, Rui Aoi, and Beni Kinojyou. They also tie, gag, and strip him.

Following a tracker hidden on Tenchi, the council interrupts the Science Club and discover the large excavation project under the building. Tenchi protects Momo as a cave-in occurs and they all have to flee.

Tenchi returns to the simple Inn that Tenchi is sharing with Sasami, Ayeka, and Ryoko. They pledge their support in helping Tenchi with his task. Washu sends a box of armor and charms she says he'll need for the job.

In an episode that heavily references the story of Kibitsuhiko no Mikoto, Tenchi and Momo encounter Inukai Takeru, Sasa Morihiko, and Tome Tamaomi (retainers of the Emperor's prince in the original story), who resemble Hachiko, Touri, and Hana. While Tenchi continues their search, they come along, in search of a monster ravaging the area. They discover and have a short battle with a Ryoko (the monster) that doesn't recognize Tenchi. First Class Detective Mihoshi arrives in a battle suit to arrest her. (In the original story, the prince and the three retainers defeat an Oni).

Tenchi tries to negotiate between the Science Club who are begging for funds from the council, who says they are misappropriating the money they have gotten. Ukan tells him teachs can't interfere.

A summary of episodes 6 to 9

This episode features prominent references to Indiana Jones and the Raiders of the Lost Ark. Tenchi and Hachiko wander a cavernous warehouse full of booby-traps to gather resources for the upcoming Cultural Festival. According to Hachiko, a guidebook is needed to navigate it. The Science Club follows them and immediately get lost and end up running for their lives from a giant rolling iron ball. Tenchi and Hachiko also have to run and lose the guidebook.

Tenchi amd Hachiko have to team with Beni to find their way out of the warehouse. When Beni tries to smash her way out, she activates the robot Goriki, which starts attacking them. Hachiko's wooden sword is broken, which reduces her to a crying mess.

Beni and Hachiko temporarily cured by using a broom for a weapon) can't defeat Goriki and Tenchi is forced to take it down with the Tenchi-ken. A dazed Beni is hazily aware of the extreme power he shows in the battle. Everyone finds their way out. Yuki and Rui run off with a cart full of "borrowed" supplies for the festival.

Hachiko and Kinojo may be strong, but they're not the best pair to be stuck in a labyrinth with.

A summary of episodes 11 to 14

After witnessing an abrupt end to a pitched battle, Tenchi and young Momo start to draw closer to their goal.

A massive misunderstanding and flare-up of egos lands Tenchi in an unexpected, yet major role in Hachiko's play.

That's "Mr. Tenchi" to you! Our ponytailed hero braves treacherous nature and bewildering encounters en route to his new gig: assistant teacher at an all-girls' high school.

A summary of episodes 16 to 19

The Student Council and the Science Club light up the runway; The group learn that beauty is a game for the grown-ups.

A massive flare-up of egos lands Tenchi in an unexpected, major role in Hachiko's play.

The Student Council gets psyched up for Sports Day; Ms. Kurihara's explanation raises the stakes for the clubs, and even more so for Tenchi.

Goriki makes an appearance, throwing the first challenge into disarray and the Student Council still has teamwork on their side.

A summary of episodes 21 to 24

Goriki's not out of the running yet, and in the second challenge, the Science Club aims to settle the score.

After things wind down, Saryu comes by with an unusual request. The school's factions prepare for a new challenge.

Tenchi and Momo share a moment of admiration, but it sounds like our hero may be in for more trouble tomorrow.

Goriki makes an appearance, throwing the first challenge into disarray. But the Student Council still has teamwork on their side.

A summary of episodes 26 to 29

A small misunderstanding escalates into a big pinch, forcing Momo to run for cover as Tenchi overhears a startling truth

In a clandestine ramen meet-up, Tenchi finds out Kinojo has a lot going on under the surface, as does the Science Club's dorm room.

Young Momo's link to Kinojo becomes crystal clear at last, and Tenchi attempts to restore order to the past.

Kinojo and Tenchi have a frank and fraught heart-to-heart as they both count on Momo to save the day.

A summary of episodes 31 to 34

A heartfelt cookout to convey sympathy for Tenchi transforms into a day of truce and relaxation for everyone involved.

Tenchi arrives back in the present with some loose ends to tie up; Tenchi and Washu plan out a mission that brings the story full circle.

Washu and the Science Club stand tall against the attackers. Momo and Kinojo finally find an answer they've both been seeking.

Tenchi gets an interesting clue about the Science Club's intentions, but the Student Council smells danger.

A summary of episodes 36 to 39

The Science Club and their new allies square off with the Student Council to buy time as Tenchi goes treasure hunting.

Kinojo and Tenchi have a frank and fraught heart-to-heart. Count on Momo to step in and save the day... Or to try, anyway.

As Tenchi and the others regroup with the Student Council, the Science Club finds a new mission and Ms Kurihara intercepts a telling communication.

Tenchi's friends hold a barbecue with the Student Council and invite the Science Club to party with them as well.

A summary of episodes 41 to 44

The event that leads to the start of this series and how Tenchi became a teacher trainee

The Science Club asks for Tenchi and his friends help looking for the treasure that they are so eager to find.

Upon meeting Mihoshi, Tenchi and the others learn more about the current situation, but certain that they were abducted by the Science Club, the Student Council launches an attack to rescue them.

The intense showdown for the presidency gets underway; Momo decides that she won't let Fuka drag her down.

A summary of episodes 46 to 49

Ryoko and Ayeka confront the Student Council while the rest of the gang help the Science Club look for the treasure they are seeking.

Upon finding the treasure, Tenchi discovers that not only it, but Momo and Beni as well are somehow connected to his mission

As Tenchi and the others regroup with the Student Council, the Science Club finds a new mission. Ms. Kurihara intercepts a telling communication.

Galactic forces have their eye on what's happening on Earth. As for the Student Council and the Science Club, all's fair in love and elections.

Momo faces the hardest decision of her life, while Washu squares off with old adversaries in a battle of wits.

Ethics go out the window as the Science Club campaign makes the most of its guile and technology.

Tenchi continues to chase after shadows, while Washu and her very reluctant adversaries strive for a deal.

Even in the face of disastrous consequences, Momo refuses to run or hide. In a rooftop heart-to-heart, she tells Tenchi what drives her.

Tenchi's dimensional dance winds down and the path to fixing what's been broken is clear, but it demands one brave sacrifice.

For Tenchi and his friends, even the students of Junai, some things never really change, even when everything does.