Isekai Maou to Shoukan Shoujo no Dorei Majutsu

In the MMORPG Cross Reverie, Takuma Sakamoto possesses an overwhelming strength, enough for other players to call him the Demon King. One day, he is summoned to another world with his in-game appearance by two people calling themselves "Summoner Masters". Following these events, Takuma is forced to become a slave due to magic used by the summoners. However, thanks to Takuma's special ability, "Magic Reflection", the two summoners are turned into slaves instead of him. This story follows this famous person, nicknamed "Demon King", who will make himself known and respected through his destructive power.