Game Master CEO no Isekai Eijuu

Game Master CEO no Isekai Eijuu summary: Everything will be possible in the world of video games in the not-too-distant future, thanks to scientific and technological advancements. One day, a game developer (Game Master) is trapped within the game he created in this world! Despite his high in-game level, knowledge of the main story, and weaknesses of each boss, nothing goes as planned. Random monsters spawn, and random bugs appear in the game. An epic tale that merges the real world with virtual reality, the past and the future, and major roles for allies and enemies, begins.