Underwear is Armor. Make Sure It's High in Defense. Otherwise, My Son Might Die! (E03)

Wise joins the party, which gets ready to head off to the village of Maman on a special quest that Shirase gave them. But first, they have to buy equipment. Mamako is overjoyed at the idea of going shopping with her son. At the armor shop, she tries on a variety of scanty outfits for Masato, which is something that he does not enjoy. He lectures her that she’s getting too excited, and makes everything awkward. But Mamako manages to make up with her son by cleaning out his ears. The party makes it to the village, where they learn that a demon called “The Empress of Night” is demanding the village’s hottest guys as a sacrifice. (Crunchyroll)