Dungeon de Service Zangyou wo Shite Ita dake nanoni ~Sasurai no S-kyuu Tansakusha to Uwasa ni Natte Shimaimashita~

Hinata Watari, an office worker plagued by endless unpaid overtime, stepped into a dungeon he spotted on his way home from work and was in high spirits as he effortlessly mowed down small-fry enemies. However, a beautiful girl being attacked by a powerful monster suddenly appears before him...!? Thanks to this encounter, Hinata's dull life completely changes!!