Yuusha ga Shinda! - Episode 4 - X-ray Vision on Girls

The featured villain had a mask that gave him x-ray vision to admire people's bones. Weak Touka only saw skin deep.

Ciruela and Isaac watched over Marguerite's date with the Hero. Marguerite confirmed Touka was an impostor occupying the Hero's body. Ciruela and Isaac wanted to kill him on the spot.

Touka convinced Ciruela and Isaac to follow him into the villain's lair because the evil doctor fooled Marguerite into following him into his lair. Thankfully, Yuna escaped, reunited with Touka, rescued Anri, and escaped with the princess.

The Undead Hero's party was still in trouble, though. They had injured people as the villain's summoned devils tracked them down. They would need the Hero's strength at full power, but how would they do that? It turned out that Marguerite's bodily fluids were rich in mana, so she agreed to replenish Touka's mana levels the fastest way possible. Golden shower of mana potion!