Dungeons & Heroines -Fushigi no Meikyuu to Ikai no Shoujo-

Aizawa Eiri is an ordinary girl, but in online games she is a famous player known as "Swordsman Airi". One day she was suddenly summoned to a different world. In this world evil dragon has been sealed for ages and mages were summoned from everywhere to prevent his revival. Edited from DMM