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

ギルドの受付嬢ですが、残業は嫌なのでボスをソロ討伐しようと思います

Alina thought she had found the perfect job as a guild receptionist. It’s stable, safe, and has a super cute uniform. But this dream gig turns into an overtime nightmare whenever adventurers get stuck clearing a dungeon. Tired of the long nights, Alina starts taking down the bosses herself! She even earns the name Executioner for her impressive skills. Can she keep her identity a secret? (Source: Crunchyroll)