–High school student Mikoshiba Ryouma was summoned to a different world for the sake helping his summoner waging wars. Sensing the malice from the one who summoned him, he reacted by killing the summoner, one of the most important people of the empire. After the escape, he rescues a pair of twin sisters from the hands of bandits. The sisters who can use magic, swear to serve him as subordinates. Thus, Ryouma begins his journey on the path of the supreme ruler.
Title: Wortenia Senki (LN)
Alternative name: Record of Wortenia War (LN), ウォルテニア戦記 (LN), 沃特尼亚战记