Ai Tenchi Muyo!

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.