Description:

Kazura bought a lottery on a whim and won 4 billion yen. To evade the hyenas that smelled the scent of his money, Kazura took refuge on an old residence that had been handed down from generation to generation. When Kazura was investigating the place that would become his shelter, he stumbled on a certain room where it was possible to go into and back from another world. The culture and technology level of that world was relatively low. The protagonist sometimes brought goods, sometimes brought technological knowledge. At that world, he would find his true value as a person. (Source: MU)

Description:

The year is 2800 and Lufas Maphaahl – The Black-Winged Tyrant, Great Conqueror, and leader of the Twelve Heavenly Stars – has returned. A man wakes up in the body of his MMO character 200 years after her defeat during an player-made event in the game, Exgate Online. Now, he's stuck in her body. But this isn't a game, it's real. With her reign long over, and her legacy one of fear, Lufas must journey through the world of Exgate, looking for answers, possible comrades, and all the monsters her “death” unleashed upon the world... (Source: J-Novel Club)

Description:

Iris, an otome game addict with no time for romance, gets hit by a truck after getting out of work–but instead of dying, she finds herself in the world of a game she'd played just hours earlier. However, she's not reborn as the game's protagonist, the main heartthrob of the harem. Instead, she starts her new life as the antagonist, right at the moment she's being sent to live in a nunnery–for the rest of her life! (Source: Seven Seas Entertainment)