From J-Novel:
In the MMORPG Cross Reverie, Takuma Sakamoto is so powerful that he is lauded as the “Demon Lord” by other players. One day, he is summoned to a world outside his own-- but with the same appearance he had in the game! There, he meets two girls who both proclaim themselves to be his Summoner. They perform an Enslavement Ritual to turn him into their Summon but…
MURASAKI Yukiya
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Unskilled in both swords and bows, Regis is a soldier who ranks last in military academy and is obsessed with books. After being banished to the borders, he met a girl who changed his destiny. With her red hair and crimson eyes, Princess Altina possess the sword of kings. Daughter of a royal consort, she was appointed as the commander of the border regiment at the tender age…