Is It Wrong to Try to Pick Up Girls in a Dungeon?, Vol. 8 (manga) — Fujino Omori

Bell and his party left for the Middle Levels and never returned, leaving Hestia to believe something has gone terribly wrong in the Dungeon! Desperate for their safety, Hestia's only option is to issue a rescue quest through the guild. That is, until Hermes offers his help-he'll go into the Dungeon to find Bell! But there's no way Hestia would let him go to rescue her Familia without her!

Gods in the Dungeon...will they be able to keep their cover and save Bell, or will their presence be revealed and everything fall to ruin...!?