"Okashi na Tensei - Episode 5" takes place in the royal capital at the estate of Duke Kadlecek. The episode begins with a meeting between Lord Morteln and Duke Kadlecek, the leader of the royal capital's central army. Duke Kadlecek introduces his grandson Squale, who has just graduated top of his class from the officers' academy. Lord Morteln's son, Pastry (Pas), is also present.

During the conversation, it is revealed that Pastry possesses magical abilities, much to the duke's admiration. Pastry demonstrates his magic by replicating a cloth, which impresses the duke. Pastry offers the replicated cloth to Squale as a gift in his name and in the name of Margrave Hubarek.

Later, the margrave's third daughter, Petra, is introduced. It turns out that Petra has been unable to leave her territory due to ongoing conflicts with a neighboring country. As a result, Squale and his father are asked to introduce her on behalf of Margrave Hubarek. Squale immediately falls in love with Petra and expresses his desire to attend her upcoming coming-of-age ceremony.

Subsequently, Lord Morteln and Pastry discuss the potential political ramifications of a marriage between Squale and Petra. They speculate that Margrave Hubarek might attempt to use the duke's military power to end the ongoing conflicts. Despite the possible dangers, they decide to ensure Petra's safety during her journey to the capital to announce her coming of age.

The episode then shifts to Margrave Hubarek's estate, where Lord Morteln and Pastry meet Margrave Hubarek and his daughters, Petra and Licorice. They plan to teleport Petra to the capital's church, where she is to remain until the announcement of her engagement. However, their journey is interrupted by attackers who intend to harm Petra. Lord Morteln and Pastry successfully fend off the attackers and escort the girls to the church.