Project Regalia, Vol. 1-light novel (English Edition)

Ren Kogami was just a simple teenage boy, living a normal life. This all changed when he found himself in a mysterious world known as Gaia, a world filled with swords, magic, and monsters. Propelled by the fear that his younger sister is one of the thousands of other "Combatants" stranded on Gaia, he sets out on a journey along with his friend Prim and other allies who also find themselves hopelessly trapped. After encountering Eva, a little girl fleeing from a “Combatant” guild that held her captive, the situation turns complicated. With many threats surrounding Ren, he struggles and learns what it takes to survive, never knowing of the greater forces at hand.