Tenchi Muyou! Ryououki: Omatsuri Zenjitsu no Yoru!
天地無用!魎皇鬼 SPECIAL お祭り前日の夜!
A few days after Kagato is defeated everything returns to normal. Ryoko finds Mihoshi and Sasami reading shojo manga which Sasami tells that they are guides to tell how to win a boy Earth style. So Ryoko decides to try to use ideas from manga to win Tenchi. Ayeka finds out what she's doing and starts using the manga to win Tenchi as well.
(Source: ANN)