Onna Majutsushi-San, Moto No Sekai E Kaeru Tame Ni Ganbarimasu summary:

Rintaro and Haruto are two friends who enjoy playing the VRMMO Eternal Maze Online, a fantasy video game where you can be a different person from the real world and enjoy a second life. One day Rintaro finds a mysterious item called the Reincarnation Jewel in his inventory so he decides to use it and teleports himself and his friend to a fantasy world. Rintaro became his female avatar who is a magician and Haruto his male avatar a strong paladin. Both stunned by what happened, they will search for information on how to get out of this fantasy world while at the same time trying to survive in this strange world so that they can return to their normal life.