With even more levels under his belt, S-rank adventurer Kisaragi Claire approaches Rin in hopes of recruiting him to the Yoizuki Guild. Now, with a new opportunity to keep leveling up in hand, Rin's back at it, dungeon diving and surpassing all expectations. However, horrors lurk in the dungeons! Will Rin's Dungeon Teleportation and skills be enough to unravel the mysteries within?