1x5 - Ai Tenchi Muyo!

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.