Isekai Mao to Shokan Shojo no Dorei Majutsu

When compared to other isekai like Log Horizon, Sword Art online or Overlord, it's more similar to Overlord. A hardcore solo player wakes in the body of his completely overpowered character in a fantasy/mmorpg world. More or less following the Overlord formula, he now has to find out how the world works and ends up helping people along the way. Although it has its awkward and funny moments one might get tired of them. Also this is falls under the "ecchi" genre, so be prepared to busty girls, panties and innuendo