Guild no Uketsukejou desu ga, Zangyou wa Iya nanode Boss wo Solo Tobatsu Shiyou to Omoimasu

Alina thought "Guild Receptionist" would be an ideal easy job. But things aren't working out, as Alina has to work overtime because her adventurers can't clear the dungeon! Her patience exhausted, Alina will take up her trusty warhammer and set out to defeat the dungeon boss herself!
(Source: Dengeki Daioh, translated)