I May Be a Guild Receptionist, but I'll Solo Any Boss to Clock Out on Time, Vol. 5 (light novel) — Mato Kousaka

After putting all her blood, sweat, and tears into her work, cutting costs, and yet more overtime, Alina has finally budgeted enough for the staff of Iffole Counter to take a two-day trip to a resort! After finishing her first fantastic day off, she dives into bed full of satisfaction...only to wake up back at the beginning of day one. Now she's stuck in an endless loop, unable to go home. Someone has ruined her precious vacation, and when she finds them, they're going to get a taste of her hammer.