Second of two one-shots released before the full serialization.

I am not “useless”! I'll prove it by conquering dungeons! One day, magical dungeons suddenly appear in modern Japan, and life is completely transformed. Midorimu Sakaki was born with a talent for life magic, which doesn't help with dungeon exploration or defeating monsters. So even though his power level is the highest rank S, he was nevertheless scorned as useless and could only find work as a clerk at a magic academy. But by chance, he comes into possession of a rare item, “Sage System,” which allows him to create new types of magic during dungeon exploration. Now he can use the system to create life magic suitable for dungeon exploration, and finally take his first step to fulfill his dream as a dungeon adventurer! (Source: Kadokawa, translated)

Alicia, a half-elf girl, was despised because of her mixed heritage. Irwin, the heir of Count Melanade, made a plot against her. The mysterious traveler Rasail saw Alicia's despair and encouraged her wish for vengeance. They conspired with the elves of Kodama-dani, Alicia's homeland, and proposed a revenge plot against the humans. Rasail's pale face sparkled in a bewitching manner, hiding the "chaos" that lies within! The legendary dark fantasy, renowned as one of Gen Urobuchi's "masterpieces of darkness," is brought to life by the heavyweight illustrator Akiman. (Source: Seikaisha, translated)