Jingai Hime-sama, Hajimemashita ~Free Life Fantasy Online~

Gamer girl Kotone is thrilled when she receives a copy of Free Life Fantasy Online, a.k.a. FLFO from her younger sister. In the world of FLFO, Kotone decides to become a zombie, one of the game's inhuman races that's difficult to master–even for experienced players. But that's not a deterrent to Kotone. In fact, when she embarks on her first quest, she finds a world of wonders that are about to become a huge part of her IRL life! ___ (https://sevenseasentertainment.com/series/free-life-fantasy-online-immortal-princess-light-novel/)