World Order

World Order (ワールドオーダー) is a light novel series by Tokihisa Kouwa with illustrations by Yumehito Ueda.

Plot
Eiji Kido is a normal high school student raised by his grandfather until his death. Eiji finds himself sucked by a mysterious light, and awakens to find himself in another world with huge creatures unfamiliar from his normal world. There, Eiji befriends a bear-like man named Loki and his disciple Airi who aims to become a professional monster hunter like her father. Eiji renames himself as Kid in his new life, and joins Air in becoming monster hunters.