When I Beat Up the Angel Who Was My Guide, I Became a Necromancer.

After starting the super-high-quality VRMMO "Meltis Online," Amane Rindou (Rinne) gets so annoyed at the guiding angel that she beats her up. Just when Rinne thinks she's stuck, an extremely cute gothic lolita evil goddess descends and offers her the hidden profession of "Necromancer"! With her servants in tow and leaving a pile of corpses in her wake, she's off to conquer the game as fast as she can! So begins this ultra-speed overpowered VRMMO tale!

(Source: Earth Star Entertainment, translated)