Touya and the others head to ruins on a new quest from the Guild to defeat a dullahan. There they encounter the ancient royal capital, abandoned after the capital was moved a millennium ago. After finishing their quest, Touya and the others explore the underground ruins for treasure. Yet what they find isn't a mountain of treasure, but a magic beast made of crystal! No attacks work on its hard body, it absorbs magic, and it even regenerates from wounds. Touya and the rest struggle against such a powerful creature... What on earth is the true identity of such a magic creature?!

Touya and the others set out to investigate some magic beasts, but it turns out their destination is the castle of a mage who researched slimes, which they'd all been avoiding (though Touya seems excited?)

Touya and the others advance to carry out their investigation, but Green Slimes capable of dissolving clothes stand in their way! They climb the staircases to run away from the slimes chasing them, but in their path are Lotion Slimes! The way forward is wet and slick! The way back is slimy and smooth! What was the goal of the research behind this slick and slimy and slime panic?!